edited by Gerald Zaltman, Philip Kotler, Ira Kaufman
Holt, Rinehart and Winston, 1972
Buku Teks
edited by S.N. Eisenstadt
Little, Brown and Company, 1968
Buku Teks
McRobert, Kenneth
McClelland and stewart, 1976
Buku Teks
edited by George K. Zollschan and Walter Hirsch
Halsted Press, 1976
Buku Teks
Moore, Wilbert E. (Wilbert Ellis), author
Prentice-Hall, 1967
Buku Teks