Παραπομπή APA

Ranjit Kumar. (2017). Research methodology: A step-by-step gruide for beginners (Ed.4.). Sage.

Παραπομπή Chicago Style

Ranjit Kumar. Research Methodology: A Step-by-step Gruide for Beginners. Ed.4. New Delhi: Sage, 2017.

Παραπομπή MLA

Ranjit Kumar. Research Methodology: A Step-by-step Gruide for Beginners. Ed.4. Sage, 2017.