Kothari, C. R. (1990). Research methodology: Methods and techniques (Second edition & Revised edition.). New Age; Wishwa Prakashan.
Chicago-referens (17:e uppl.)Kothari, C. R. Research Methodology: Methods and Techniques. Second edition & Revised edition. New Delhi: New Age; Wishwa Prakashan, 1990.
MLA-referens (8:e uppl.)Kothari, C. R. Research Methodology: Methods and Techniques. Second edition & Revised edition. New Age; Wishwa Prakashan, 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.