Citazione Stile APA (7a Edizione)

Kumar, K. (1987). Reference service (5th rev. ed.). Vikas.

Citazione stile Chigago Style (17a edizione)

Kumar, Krishan. Reference Service. 5th rev. ed. New Delhi: Vikas, 1987.

Citatione MLA (9a ed.)

Kumar, Krishan. Reference Service. 5th rev. ed. Vikas, 1987.