Zaipul Bahari, Farah Aizar, and Salmiza Saleh. “Content Validation Procedure: Development of Problem-Solving Skills Test (PSST): Prosedur Pengesahan Kandungan: Pembangunan Ujian Kemahiran Penyelesaian Masalah (PSST)”. Jurnal Pendidikan Sains dan Matematik Malaysia 13, no. 1 (May 14, 2023): 1–9. Accessed November 23, 2024. https://ejournal.upsi.edu.my/index.php/JPSMM/article/view/7630.