Gupta, Mukul. Research methodology. by Mukul Gupta and Deepa Gupta. - 1st. ed. - - New Delhi: PHI Learning Pvt Ltd, 2011. - xvi,240p. ; 23.1 cm. ISBN: 9788120343818 Subjects--Topical Terms: Research Methodology.Hypothesis.Research Design.Data Collection. Dewey Class. No.: 001.42 / GUPM