APA استشهاد

Kothari, C. (1990). Research methodology /2e: Methods and techniques (2nd Ed.). New Age International.

استشهاد بنمط شيكاغو

Kothari, C.R. Research Methodology /2e: Methods and Techniques. 2nd Ed. New Delhi: New Age International, 1990.

MLA استشهاد

Kothari, C.R. Research Methodology /2e: Methods and Techniques. 2nd Ed. New Age International, 1990.