M. S. Mohamed Sunar and A. J. Shaari, “Keberkesanan kaedah PBL via Facebook dalam kalangan pelajar Pra-Universiti: The effectiveness of PBL via Facebook methods among Pre-University students”, JPSMM, vol. 7, no. 2, pp. 52–71, Dec. 2017, doi: 10.37134/jpsmm.vol7.2.5.2017.