(2012). Teaching and learning at a distance: Foundations of distance education (5. ed.). Allyn & Bacon.
Chicago-Zitierstil (17. Ausg.)Teaching and Learning at a Distance: Foundations of Distance Education. 5. ed. Boston ; Munich [u.a.]: Allyn & Bacon, 2012.
MLA-Zitierstil (9. Ausg.)Teaching and Learning at a Distance: Foundations of Distance Education. 5. ed. Allyn & Bacon, 2012.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.