APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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