Kotler, Philip. Principles of marketing / Philip Kotler, Gary Armstrong. - 7th ed. - Englewood Cliffs, NJ : Prentice Hall, 1996. - xviii, 122 p. : col. ill. ; 28 cm. ISBN: 0132286858 (pbk.) Subjects--Topical Terms: Marketing.Marketing--Management. Dewey Class. No.: 658.8 / K87