Imawan, Okky Riswandha. “Perbandingan Antara Keefektifan Model Guided Discovery Learning Dan Project-Based Learning Pada Matakuliah Geometri”. PYTHAGORAS Jurnal Matematika Dan Pendidikan Matematika, vol. 10, no. 2, Dec. 2015, pp. 179-88, doi:10.21831/pg.v10i2.9156.