Kothari, C. R. (2020). Research methodology (4th.). New Age International Publisher, New Delhi.
Chicago-čujuhus (17. p.)Kothari, C. R. Research Methodology. 4th. New Age International Publisher, New Delhi, 2020.
MLA-čujuhus (9. p.)Kothari, C. R. Research Methodology. 4th. New Age International Publisher, New Delhi, 2020.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.