Daulay, Naimatussyifa, dan Hasruddin Hasruddin. “ANALYSIS OF KNOWLEDGE AND ATTITUDES TOWARD GENERAL BIOLOGY OF FACULTY MATHEMATIC AND NATURAL SCIENCES™ STUDENTS STATE UNIVERSITY OF MEDAN”. Jurnal Pelita Pendidikan, vol. 4, no. 2, Juni 2016, doi:10.24114/jpp.v4i2.4018.