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:
| -, Dr. Sujono |
| Abdelkader Benmansour, Nada |
| Abdulkareem, Abdulrazaq |
| Adetunji, Adeniyi |
| Afonso, Carlos |
| Ahern, Deirdre |
| Ahmad Tajuddin, Ahmad Fadzli |
| Ahmad, Hawa |
| Al-Kilani, Mohammad Hani |
| Al-rawad, Mahmaod |
| Albano, Claudio |
| Alexopoulos, Charalampos |
| Almeida, Fernando |
| Almeida, Maria |
| Alshaher, Ali |
| Alsharari, Nizar |
| Alzahrani, Ahmed |
| Anand, Abhishek |
| Antil, Anjuman |
| Anwer, Mustafa |
| Bahadure, Sarika |
| Batara, Enrique |
| Becker, Jörg |
| Beynon-Davies, Paul |
| Bodziany, Marek |
| Bohorquez Lopez, Victor Wilfredo |
| Bostancı, Seda H. |
| Brous, Paul |
| Calabrese, Mario |
| Calzada, Igor |
| Caputo, Fabio |
| Caputo, Francesco |
| Casqueira Cardoso, João |
| Chandler, Susan |
| Chatterjee, Sheshadri |
| Che Azmi, Anna |
| Clarinval, Antoine |
| Correa da Silva, Flavio |
| Criado, J. Ignacio |
| Cucino, Valentina |
| Cunha, Alice |
| Darmawan, Ikhsan |
| demirel, demokaan |
| Dempere, Juan |
| DePaula, Nic |
| Dias, Gonçalo |
| Dodoo, Joana |
| Duhamel, Francois |
| Dumas, Bruno |
| Dumas, Catherine |
| Dwyer, Rocky J |
| Edelmann, Noella |
| Esposito, Benedetta |
| Ferro, Enrico |
| Flak, Leif |
| Gaies, Brahim |
| Gerli, Paolo |
| Gonçalves dos Reis, João Carlos |
| Gong, Yiwei |
| Gouri, Vasantha |
| Grimaldi, Mara |
| Gupta, Mpgupta |
| Hassan, M. Hamad |
| Homburg, Vincent |
| Hornik, Richard |
| Hwang, Kwangseon |
| Jain, Vikas |
| Janssen, Marijn |
| Joha, Anton |
| Juiz, Carlos |
| Kumar, Yogesh |
| Kusumasari, Bevaola |
| Lee, Ally |
| Leite, Isabel Costa |
| Loia, Francesca |
| Lourenço, Rui Pedro |
| Maione, Gennaro |
| Malik, Radoslaw |
| Malik, Sakshi |
| Maragoudakis, Manolis |
| Medaglia, Rony |
| Mishra, Brajesh |
| Montera, Raffaella |
| Najafabadi, Mahdi |
| Nam, Taewoo |
| Nikiforova, Anastasija |
| Okunola, Olaseni |
| Pachocka, Marta |
| Panda, Prabir |
| Panigrahi, Prabin |
| Papcunová, Viera |
| Pekkola, Samuli |
| Pinglu, Chen |
| Polese, Francesco |
| Popoli, Paolo |
| Purwanto, Arie |
| Ramadani, Luthfi |
| Razek, Shahira |
| Ruijer, Erna |
| S., Kedarnath |
| Saeedi, Kawther |
| Saini, Neha |
| Sandoval-Almazan, Rodrigo |
| Schiavone, Francesco |
| Sevinç Çubuk, Ecem |
| Shapiro, Matthew |
| Sharma, Rakesh |
| Sokołowski, Maciej |
| Sorentino, Daniela |
| Sorrentino, Daniela |
| Surucu Balci, Ebru |
| Szente-Varga, Mónika |
| Tommasetti, Roberto |
| Torre, Carlo |
| Troisi, Orlando |
| Vila Maior, Paulo |
| Vishwanathan, Arun |
| Vragov, Roumen |
| Walle, Yelkal |
| Wang, Jun |
| Weng Marc, Lim |
| Wilson, Rob |
| Zhu, Yonghan |