Rosid, Muhamad Nurdin Matondang and Hanum (2018) “The effect of Learning Strategy of Assurance, Relevance, Interest, Assessment, and Satisfaction (Puzzle Vs Video) on Ecosystem to Students Cognitive Learning Result”, Biosfer: Jurnal Pendidikan Biologi, 7(2), pp. 41–46. doi: 10.21009/biosferjpb.7-2.7.