Παραπομπή APA

Kothari, C. (1990). Research methodology: Methods and techniques (2nd.). Wiley eastern limited New Age International.

Παραπομπή Chicago Style

Kothari, C.R. Research Methodology: Methods and Techniques. 2nd. New Delhi: Wiley eastern limited New Age International, 1990.

Παραπομπή MLA

Kothari, C.R. Research Methodology: Methods and Techniques. 2nd. Wiley eastern limited New Age International, 1990.