Kotler, Philip Marketing management : analysis, planning, implementation and contral / Philip Kotler - 7th ed. - New Jersey : Prentice-Hall, c1991. - xxvi, 756 p. : ill. ; 25 cm. ISBN: LCCN: LC Class. No.: HF5415.13 / .K64 1991 Dewey Class. No.: 658.8 / K87m