Ratna, Vivek, and Folkert Castelein. “Focus E-Learning on Specific Small Target Groups (doi: 10.3991 ijac.V1i2.536)”. International Journal of Advanced Corporate Learning (iJAC) 1, no. 2 (October 29, 2008): pp. 36–41. Accessed May 3, 2024. https://online-journals.org/index.php/i-jac/article/view/536.