Kumar, R. (2011). Research Methodology (3rd ed.). Sage Publications India Pvt. Ltd.
Citazione stile Chigago Style (17a edizione)Kumar, Ranjit. Research Methodology. 3rd ed. New Delhi: Sage Publications India Pvt. Ltd, 2011.
Citatione MLA (9a ed.)Kumar, Ranjit. Research Methodology. 3rd ed. Sage Publications India Pvt. Ltd, 2011.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.