Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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