APA-referens (7:e uppl.)

Kumar, A. (1999). Learner performance in distance education. Commonwealth.

Chicago-referens (17:e uppl.)

Kumar, Anil. Learner Performance in Distance Education. New Delhi: Commonwealth, 1999.

MLA-referens (9:e uppl.)

Kumar, Anil. Learner Performance in Distance Education. Commonwealth, 1999.