Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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