Citazione Stile APA (7a Edizione)

Kumar, S. (1974). The Changing concepts of reference service. Vikas.

Citazione stile Chigago Style (17a edizione)

Kumar, Suseela. The Changing Concepts of Reference Service. Delhi: Vikas, 1974.

Citatione MLA (9a ed.)

Kumar, Suseela. The Changing Concepts of Reference Service. Vikas, 1974.