[2] Martin, J., Developing Course Material for Online Adult Instruction¸ MERLOT Journal of Online Learning and Teaching Vol. 5, No. 2, p. 366, June 2009
[5] Brookfield, Stephen D., Understanding and facilitating adult learning: A comprehensive analysis of principles and effective practices, San Francisco: Jossey-Bass, 1986
[11] Martin, J., Developing Course Material for Online Adult Instruction¸ MERLOT Journal of Online Learning and Teaching Vol. 5, No. 2, p. 367, June 2009