Yahya, M. S. S., N. F. Masdar, and N. Samat. “The Degree of Perception, Evaluation and Competency on Problem Based Learning (PBL) and Higher Order Thinking Skills Among Form Six Students at Pontian District: Tahap Persepsi, Penilaian Dan Kompetensi Pembelajaran Berasaskan Masalah (PBM) Dan Kemahiran Berfikir Aras Tinggi (KBAT) Dalam Kalangan Pelajar Tingkatan Enam Di Daerah Pontian”. Perspektif Jurnal Sains Sosial Dan Kemanusiaan, vol. 12, no. 2, Oct. 2020, pp. 20-32, doi:10.37134/perspektif.vol12.2.3.2020.