Παραπομπή APA

Drexler, K. (2012). Keys to online learning. Pearson.

Παραπομπή Chicago Style

Drexler, Kateri...[et.al]. Keys to Online Learning. Boston: Pearson, 2012.

Παραπομπή MLA

Drexler, Kateri...[et.al]. Keys to Online Learning. Pearson, 2012.