Kumar, R. (2019). Research methodology: A step-by-step guide for beginners (5th.). Sage.
Chicago-čujuhus (17. p.)Kumar, Ranjit. Research Methodology: A Step-by-step Guide for Beginners. 5th. Los Angeles: Sage, 2019.
MLA-čujuhus (9. p.)Kumar, Ranjit. Research Methodology: A Step-by-step Guide for Beginners. 5th. Sage, 2019.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.