[
1. Carliner, S. (2004), “An Overview of Online Learning”, Second ed., Massachusetts: HRD Press Inc., available at https://books.google.hr/books?hl=en&lr=&id=cVzEcy4GxkC&oi=fnd&pg=PP9&dq=online+learning&ots=JrpZ7J3qK-&sig=xmD1OT7_iNapEjZ3He7CmAX5oXQ&redir_esc=y#v=onepage&q=online%20learning&f=false (5 January 2022)
]Search in Google Scholar
[
2. Moore, J. L., Dickson-Deane, C., Galyen, K. (2011), “e-Learning, online learning, and distance learning environments: Are they the same?” The Internet and Higher Education, Vol. 14, No. 2, pp. 129–135. https://doi.org/10.1016/J.IHEDUC.2010.10.001.10.1016/j.iheduc.2010.10.001
]Search in Google Scholar
[
3. Nichols, M. (2003), “A theory for eLearning”, available at http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.92.4852&rep=rep1&type=pdf (14 December 2021)
]Search in Google Scholar
