Não informado. (2007). Learning resources. Association for Educational Communications and Technology.
Chicago-referens (17:e uppl.)Não informado. Learning Resources. Washington: Association for Educational Communications and Technology, 2007.
MLA-referens (8:e uppl.)Não informado. Learning Resources. Association for Educational Communications and Technology, 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.