APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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