Makalah Pertemuan Ilmiah PBI 2013
The Differentiation Of Students Learning Achievement And Critical Thinking Between The Using Of Learning Video And Graphic As Media In Problem Based Learning (Pbl) Model In Sma Negeri 3 Medan. In: Seminar Nasional ke-22 Perhimpunan Biologi Indonesia. Seminar Nasional ke-22 Perhimpunan Biologi Indonesia. Purwokerto, Jawa Tengah, Indonesia: Fakultas Biologi Unsoed; 2013.
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