Kothari C. R. Research Methodology (2nd ed.). New Age International Limited, Publishers.
Citazione stile Chigago Style (17a edizione)Kothari C. R. Research Methodology. 2nd ed. New Age International Limited, Publishers.
Citatione MLA (9a ed.)Kothari C. R. Research Methodology. 2nd ed. New Age International Limited, Publishers.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.