Kothari, C R. Research methodology: methods and techniques / C R Kothari and Gaurav Garg. - 3rd. ed . - - New Delhi: New Age International Pvt Ltd, 2014. - xx,449p. ; 24 cm. ISBN: 9788122436235 Subjects--Topical Terms: Research Methodology Dewey Class. No.: 001.42 / KOTC