KASSIM, A. H.; DERIS, C. Z. Tahap Pemahaman Konsep Jadual Berkala dan Struktur Atom serta Aplikasinya dalam Kalangan Pelajar Sekolah Menengah di Daerah Gua Musang, Kelantan: The Understanding Level of Periodic Table and Atomic Structure Concepts and its Application among the Secondary School Students of Gua Musang District, Kelantan. Journal of Science and Mathematics Letters, [S. l.], v. 4, n. 1, p. 43–52, 2012. Disponível em: https://ejournal.upsi.edu.my/index.php/JSML/article/view/468. Acesso em: 29 apr. 2024.