Safiah, I., I. N. S. Degeng, P. Setyosari, and S. Ulfa. “Design and Development of Seamless Learning to Improving Learning Outcome of Islamic Economic Course: a Case Study in Indonesia”. Journal of E-Learning and Knowledge Society, Vol. 16, no. 3, Oct. 2020, pp. 60-67, doi:10.20368/1971-8829/1135249.