Marfani, Marfani, et al. “PENGARUH MODEL PEMBELAJARAN KOOPERATIF TIPE STAD (STUDENT TEAM ACHIEVEMENT DIVISION) DI PADU NHT (NUMBERED HEADS TOGETHER) TERHADAP MOTIVASI DAN HASIL BELAJAR KOGNITIF SISWA”. Bioscientist : Jurnal Ilmiah Biologi, vol. 5, no. 1, June 2017, pp. 13-21, doi:10.33394/bioscientist.v5i1.174.