Kumar, R. (2014). Research Methodology: A step by step guide for beginners (4th ed.). Sage.
Citazione stile Chigago Style (17a edizione)Kumar, Ranjit. Research Methodology: A Step by Step Guide for Beginners. 4th ed. New Delhi: Sage, 2014.
Citatione MLA (9a ed.)Kumar, Ranjit. Research Methodology: A Step by Step Guide for Beginners. 4th ed. Sage, 2014.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.