Gilbert, L., & Gale, V. (2008). Principles of e-learning systems engineering. Chandos Publishing.
Παραπομπή Chicago StyleGilbert, Lester, και Veronica Gale. Principles of E-learning Systems Engineering. Oxford: Chandos Publishing, 2008.
Παραπομπή MLAGilbert, Lester, και Veronica Gale. Principles of E-learning Systems Engineering. Chandos Publishing, 2008.
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