Kotler, Philip. Principles of marketing: an introduction/ Philip Kotler & Gary Armstrong. - 4th ed. - Upper Saddle River, NJ : Prentice Hall, c1997. - xxix, 585 p. : ill. (col.) ; 26 cm. "international edition" Includes bibliographical references and indexes. ISBN: 0132631202 Subjects--Topical Terms: Marketing. LC Class. No.: HF5415 / .K68 1997