1. Anderson, T. (2004). Towards a theory of online learning. Theory and Practice of Online Learning, 2, 109-119. Retrieved from https://auspace.athabascau.ca/bitstream/handle/2149/757/toward_a_theory_of.pdf?sequence=3
2. Innovative practices in ODL — the experience of Open University Malaysia
3. Collins, A., Brown, J. S., & Newman, S. E. (1989). Cognitive apprenticeship: Teaching the crafts of reading, writing, and mathematics. Knowing, learning, and instruction: Essays in honor of Robert Glaser, 18, 32-42.
4. Linking national standards of distance education with e-learning ecosystem.;P.Dewanti;Journal of Theoretical & Applied Information Technology,2016