Sa’adah, Siti. “Edu-PHOTSIC (Education Program for Test of High Order Thinking Skill in Chemistry): Upaya Meningkatkan Kemampuan Peserta Didik SMAN 2 Siak Hulu Dalam Menghadapi Ujian Nasional”. Unri Conference Series: Community Engagement 1 (September 27, 2019): 150-157. Accessed May 28, 2026. http://conference.unri.ac.id/index.php/unricsce/article/view/57.