The publishing and editorial teams would like to thank the following, for their invaluable service as 2021 reviewers for this journal. We are very grateful for the contributions made. With their help, the journal has been able to publish such high-quality articles:
| Abas Azmi, Khairul Saidah |
| Abdelfattah, Tarek |
| Abdelmoula , Lassaad |
| Abdul Hamid, Masdiah |
| Abdul Wahab, Effiezal Aswadi |
| Abdullah , Dewi Fariha |
| Abdullatif, Modar |
| Adamus-Matuszyńska, Anna |
| Adelopo, Ismail |
| Adithipyangkul, Pattarin |
| Afrifa, Godfred |
| Ahmed, Ammad |
| Akroyd, Chris |
| Al Lawati, Hidaya |
| Al Mahameed, Muhammad |
| Al-Dhamari, Redhwan |
| Ali, Muqaddam Oyetunji |
| Alm El-Din, Mai |
| Almasarwah, Adel |
| Almutawa, Abdullah |
| Ang, Tze Chuan 'Chewie' |
| Anisiuba, Chika |
| Arunachalam, Murugesh |
| Ashfaq, Khurram |
| Awwad, Bahaa |
| Azim, Mohammad |
| Azzam, Mohsen |
| Bakarich, Kathleen |
| Baloch, Muhammad Saad |
| Bansal, Manish |
| Bedford, Anna |
| Berglund, Nathan |
| Bhabra, Gurmeet |
| Biswas, Pallab Kumar |
| Bose, Sudipta |
| Brown, Alistair |
| Buachoom, Wonlop |
| Bui, Binh |
| Cao, June |
| Carvajal, Mariela |
| Chakroun, Raida |
| Chan, Kam |
| Chatjuthamard, Pattanaporn |
| Chen, Theodore |
| Chen, Yan |
| Chiah, Mardy |
| Cordery, Carolyn |
| Costa, Mabel |
| De Lange, Paul |
| Delaney, Deborah |
| Dharmasiri, Prabashi |
| Drogalas, George |
| El-Halaby, Sherif |
| Elamer, Ahmed |
| Elbayoumi, Ahmed |
| ElDeeb, Mohamed |
| Elkmash, Marwa Rabe |
| Elmagrhi, Mohamed |
| Elms, Natalie |
| Elshandidy, Tamer |
| Eulaiwi, Baban |
| Evans, Christopher C |
| Fakhari, Hossein |
| Farag, Magdy |
| Farooq, Muhammad |
| Farooque, Omar |
| Folsom, David |
| Fowler, Carolyn |
| Fu, Dale Yi |
| Gao, R |
| Garfatta, Riadh |
| Garg, Mukesh |
| Grosse, Matthew |
| Gyapong, Ernest |
| Haider, Imran |
| Hamdan, Allam Mohammed Mousa |
| Hansen, Thomas |
| Hasan, Mostafa |
| Hassan, Abeer |
| Hoang, Khoa |
| Hollindale, Janice |
| Hoseininasab, Hojat |
| Hossain, Mohammed |
| Hu, Yuanyuan |
| Huang, Hedy |
| Huang, Peng |
| Huber, Wm. Dennis |
| Hussainey, Khaled |
| Islam, Kazi |
| Islam, Md Ariful |
| Islam, Md Tarikul |
| Ismail, Aida Hazlin |
| Jia, Jing |
| Jusoh, Ruzita |
| Kabir, Humayun |
| Kamal, Yousuf |
| Kamarudin, Khairul Anuar |
| Kanapathippillai, Sutharson |
| Kaur, Jaspreet |
| Khan, Habib |
| Kumari, Pooja |
| Kutubi, Shawgat |
| Kyiu, Anthony |
| Lau, David |
| Lee, Byung |
| Li, Wenquan |
| Lord, Beverley |
| Low, Mary |
| Luke, Belinda |
| Luong, Hoa |
| Makarem, Naser |
| Mala, Rajni |
| Man, Paul |
| Marei , Dr. Yahya |
| Marlowe, Justin |
| Marques, Mário |
| Meder, Anthony |
| MEI, Shunji |
| Miah, Muhammad |
| Mishra, Chandra |
| Mohapatra, Malaya |
| Moses, Olayinka |
| Moses, Yinka |
| Moulang, Carly |
| Mousavi Shiri, Mahmoud |
| Mu, Yuandong |
| Mui, Grace |
| Muttakin, Mohammad |
| Nabil, Nouran |
| Nadeem, Muhammad |
| Nagar, Neerav |
| Nahar, Shamsun |
| Nandan, Ruvendra |
| Negash, Minga |
| Nerantzidis, Michail |
| Ng, Frederick |
| Nour, Prof,Dr,Abdulnaser |
| Nowland, John |
| Oanh, Le Thi Tu |
| Opare, Solomon |
| Othman, Rani Diana |
| Oussii, Ahmed Atef |
| Palas, Rimona |
| Perkhofer, Lisa |
| Pham, Hanh |
| Popkova, Elena |
| Prasad, Vishwa |
| prokofieva, maria |
| Qian, Wei |
| Qu, Tracy Xin |
| Quayle, Annette |
| Ragunathan, Vanitha |
| Rahaman, Md. Mustafizur |
| Ramani, Vinay |
| Rampling, Peter |
| Rana, Tarek |
| Ranasinghe, Dinithi |
| Ribeiro, Carlos |
| Rosli , Rasyidah |
| Salehi, Mahdi |
| Salisu Maigoshi, Zaharaddeen |
| Sands, John |
| Sangchan, Pinprapa |
| Secinaro, SIlvana |
| Sharma, Umesh |
| Siddiqui, Javed |
| Silaen, Parulian |
| Singh, Abhijeet |
| Singh, Harjinder |
| Sinnadurai, Philip |
| Sivabalan, Prabhu |
| Soobaroyen, Teerooven |
| Southam, Colette |
| Stef, Nicolae |
| Suleman, Muhammad Tahir |
| Sun, Xuan |
| Syed Mustapha Nazri, Sharifah Nazatul Faiza |
| Tan, Yongxian |
| Tarigan, Josua |
| Tham, Yeut Hong |
| Ur Rehman, Ramiz |
| Vadasi, Christina |
| Vithessonthi, Chaiporn |
| Wachira, PhD, Mumbi |
| Wei, Zi |
| White, Amanda |
| White, Gregory |
| Wieczorek-Kosmala, Monika |
| Wilkin, Carla |
| Williams, Satina |
| Wong, Alfred |
| Wood, David |
| Xiang, Erwei |
| Xiao, Qin |
| Xu, Le (Emily) |
| Yarram, Subba Reddy |
| Ye, Min |
| Yiannoulis, Yiannis |
| Yuan, Shuai |
| Zaman, Rashid |
| Zharfpeykan, Ramona |
| Zhaunerchyk, Kate |
| Zheng, Ying |
| Zuriegat, Qasim |