Kotler, Philip . Marketing management / by Philip Kotler... et al. . - 13th ed. / - Delhi : Dorling Kindersley (India) Pvt. Ltd. , 2009 - xlvii, 647p, I28 : ISBN: 978-81-317-1683-0 Subjects--Topical Terms: Management, Marketing Dewey Class. No.: X:51:8 / P9;1