Gupta, S. L. Business research methods / S.L. Gupta, Hitest Gupta. - New Delhi : Tata McGraw Hill Education, 2012. - xix, 440 p. : ill. ; 23 cm. ISBN: 9781259005039 (pbk.) RM45.50 1259005038 (pbk.) Subjects--Topical Terms: Business--Research--Methodology.