Não informado. (1980). Distance education. University of Southern Queensland, Distance Education Centre.
Chicago-referens (17:e uppl.)Não informado. Distance Education. Toowoomba, Australia: University of Southern Queensland, Distance Education Centre, 1980.
MLA-referens (8:e uppl.)Não informado. Distance Education. University of Southern Queensland, Distance Education Centre, 1980.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.