Joshua, J., I. P. A. Swastika, and N. M. Estiyanti. “The Effectiveness of E-Learning Implementation Using Social Learning Network Schoology on Motivation & Learning Achievement”. Jurnal Nasional Pendidikan Teknik Informatika : JANAPATI, vol. 5, no. 1, Mar. 2016, pp. 28-33, doi:10.23887/janapati.v5i1.9914.