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:
| Agarwal, Nishant |
| Ahmad, Abd Halim |
| Ahmad, Fawad |
| Aishath, Muneeza |
| Akroyd, Chris |
| Al-Khazali, Osamah |
| Albada, Ali |
| Ali, Irshad |
| Anderson, Warwick |
| Anggraini, Puspita |
| Arunachalam, Murugesh |
| Bayne, Lyndie |
| Beattie, Claire |
| Bengtsson, Maria |
| Bhattacharya, Sukanto |
| Bhuiyan, Md. Borhan |
| Biswas, Pallab |
| Biswas, Sharlene |
| Bjornsen, Matt |
| Bobe, Belete |
| Bond, David |
| Botes, Vida |
| Botica Redmayne, Nives |
| Boubaker, Sabri |
| Brennan, Niamh M. |
| Carvajal, Mariela |
| Castelo Branco, Manuel |
| Charifzadeh, Michel |
| Chen, Li |
| Clarkson, Peter |
| Cordery, Carolyn |
| Costa, Mabel D |
| De Groote, Sander |
| De Lange, Paul |
| Delaney, Deborah |
| Dixon, Keith |
| Do, Hung |
| Dow, Kevin |
| Duong Xuan, Truong |
| Duong, Nhan Huu |
| Edeigba, Jude |
| Ehalaiye, Dimu |
| Fahad, Nafiz |
| Falta, Michael |
| Farooq, Muhammad |
| Farooq, Muhammad Bilal |
| Félix, Elisabete |
| Feng, Zhuoan |
| Fisher, Richard |
| France, Adrian |
| Fukofuka, Peni |
| Gepp, Adrian |
| Ghauri, Ehtasham |
| Grosse, Matthew |
| Gupta, Gaurav |
| Gutierrez, Elizabeth |
| Habib, Ahsan |
| Haniffa, Roszaini |
| Harrison, Julie |
| Hay, David |
| Ho, Catherine |
| Hsu, Wei-Huei |
| Hu, Yuanyuan |
| Huang, Hedy Jiaying |
| Indriawan, Ivan |
| Islam, Muhammad |
| Islam, Syrus |
| Islam, Tarikul |
| Jackson, Denise |
| Jahan, Asma |
| Jamel, Lamia |
| Jia, Jing |
| Kabir, Humayun |
| Kaur, Amanpreet |
| Keeper, Trish |
| Kent, Pamela |
| Khan, Arifur |
| Khan, Ashfaq |
| Kommunuri, John |
| Krishnamurti , Chandra |
| Kummer, Tyge |
| Laswad, Fawzi |
| Lau, David |
| Le, Ben |
| Lechner, Eva |
| Lee, Sungsil |
| Li, Michelle |
| Li, Zhichuan (Frank) |
| Liew, Angela |
| Lodhia, Sumit |
| Loftus, Janice |
| Low, Mary |
| Lubberink, Martien |
| Luo, Le |
| Ma, Diandian |
| Madah marzuki, Marziana |
| Marriott, Lisa |
| Marsden, Alastair |
| Md Humayun, Kabir |
| Mehmood, Waqas |
| Mgammal, Mahfoudh Hussein |
| Mirza, Sultan |
| Mohd-Rashid, Rasidah |
| Momin, Mahmood |
| Moses, Olayinka |
| Nadeem, Muhammad |
| Narayan, Anil |
| Nath, Nirmala |
| Ng, Frederick |
| Nguyen H., Nhut |
| Nguyen, Harvey |
| Nguyen, Lan Anh |
| Nguyen, Tuan |
| Nik Abdul Majid, Wan Zurina |
| Nyamori, Robert |
| Oosthuizen, Heinrich |
| Opare, Solomon |
| Orhun, Eda |
| Othman, Radiah |
| OU, Jitao |
| Parsa, Sepideh |
| Prescott, James |
| Rahman, Asheq |
| Rainsbury, Elizabeth |
| Ramezanian, Nava |
| Rao, Kathyayini |
| Roberts, Helen |
| Rouse, Paul |
| Sahoo, Abhimanyu |
| Sawicki, Julia |
| Schaper, Stefan |
| Schiemann, Frank |
| Scott, Tom |
| Shahwan, Tamer |
| Shahzad, Faisal |
| Sharma, Divesh |
| Sharma, Umesh |
| Smith, Christelle |
| Stent, Warwick |
| Suleman, Tahir |
| Sun, Lan |
| Tan, Lin |
| Taylor, Grantley |
| Tharapos, Meredith |
| Tommasetti, Roberto |
| Tripe, David |
| Truong, Thu Phuong |
| Ullah, Hafij |
| ULLAH, IRFAN |
| Van Akkeren, Jeanette |
| van Liempd, Dennis |
| van Zyl, Warrick |
| Wang, Tawei (David) |
| Wasiuzzaman, Shaista |
| Wells, Paul |
| Werner, Michael |
| Willett, Roger |
| Wilmshurst, Trevor |
| Wu, Julia |
| Xie, Sujuan |
| Xie, Yuying |
| Yaghoubi, Mona |
| Yang, Bei |
| Yang, Cherrie |
| Yang, Ting |
| Yarram, Subba |
| Yong, Sue |
| Zakaria, Idlan |
| Zaman, Rashid |
| Zharfpeykan, Ramona |