Koul, L. (1984). Methodology of educational research. Vikas.
Cita Chicago (17th ed.)Koul, Lokesh. Methodology of Educational Research. New Delhi: Vikas, 1984.
Cita MLA (8th ed.)Koul, Lokesh. Methodology of Educational Research. Vikas, 1984.
Atenció: Aquestes cites poden no estar 100% correctes.