APA aipamena

Verma R. K. & Verma, G. (1989). Research methodology. Common Wealth Publishers.

Chicago Style aipamena

Verma R. K. and Gopal Verma. Research Methodology. New Delhi: Common Wealth Publishers, 1989.

MLA aipamena

Verma R. K. and Gopal Verma. Research Methodology. Common Wealth Publishers, 1989.