APA-referens (7:e uppl.)

Kumar, R. (2019). Research methodology: A step-by-step guide for beginners (5th.). Sage.

Chicago-referens (17:e uppl.)

Kumar, Ranjit. Research Methodology: A Step-by-step Guide for Beginners. 5th. Los Angeles: Sage, 2019.

MLA-referens (9:e uppl.)

Kumar, Ranjit. Research Methodology: A Step-by-step Guide for Beginners. 5th. Sage, 2019.