Sharma, D. (2011). Distance education and student support services. Omega Publication.
Chicago-referens (17:e uppl.)Sharma, Darshana. Distance Education and Student Support Services. New Delhi: Omega Publication, 2011.
MLA-referens (9:e uppl.)Sharma, Darshana. Distance Education and Student Support Services. Omega Publication, 2011.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.