Παραπομπή APA

Gupta, M., & Gupta,Deepa. (2011). Research methodology. PHI learning.

Παραπομπή Chicago Style

Gupta, Mukul, και Gupta,Deepa. Research Methodology. New Delhi: PHI learning, 2011.

Παραπομπή MLA

Gupta, Mukul, και Gupta,Deepa. Research Methodology. PHI learning, 2011.