APA aipamena

 Kumar, R. (2011).  Research methodology: A step-by-step guide for beginners.  Sage.

Chicago Style aipamena

 Kumar, Ranjit.  Research Methodology: A Step-by-step Guide for Beginners.  Sage, 2011.

MLA aipamena

 Kumar, Ranjit.  Research Methodology: A Step-by-step Guide for Beginners.  Sage, 2011.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.