Shashi Kumar. (2010). Quantitative techniques & methods.
Lua i Stíl Chicago (17ú heag.)Shashi Kumar. Quantitative Techniques & Methods. New Delhi, 2010.
Lua MLA (9ú heag.)Shashi Kumar. Quantitative Techniques & Methods. 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.