Zulkifli, N.N., Abd Halim, N.D., Yahaya, N., Meijden, H.V.D., Mohd Zaid, N., A Rashid, A.H. and Hashim, S. 2021. Online Reciprocal Peer Tutoring Approach in Facebook: Measuring Students’ Critical Thinking. International Journal of Emerging Technologies in Learning (iJET). 16, 23 (Dec. 2021), pp. 16–28. DOI:https://doi.org/10.3991/ijet.v16i23.27451.