Παραπομπή APA

Koul, L. Methodology of educational research (Ed.2 rev.).

Παραπομπή Chicago Style

Koul, Lokesh. Methodology of Educational Research. Ed.2 rev. New Delhi, Vikas Publishing House.

Παραπομπή MLA

Koul, Lokesh. Methodology of Educational Research. Ed.2 rev.