APA-viite

Koul,, . L. (1997). Methodology of educational research (3rd rev ed.). Vikas.

Chicago-tyylinen lähdeviittaus

Koul,, Lokesh. Methodology of Educational Research. 3rd rev ed. New Delhi: Vikas, 1997.

MLA-viite

Koul,, Lokesh. Methodology of Educational Research. 3rd rev ed. Vikas, 1997.