Kumar, R. (2014). Research methodology: Stepbystep guide for beginners (Fourth edition.). SAGE.
Lua i Stíl Chicago (17ú heag.)Kumar, Ranjit. Research Methodology: Stepbystep Guide for Beginners. Fourth edition. Los Angeles: SAGE, 2014.
Lua MLA (9ú heag.)Kumar, Ranjit. Research Methodology: Stepbystep Guide for Beginners. Fourth edition. SAGE, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.