Marketing contemporary concepts and practices / William F. Schoell ; Joseph P. Guiltinan. (1998). Englewood Cliffs, NJ: Prentice-Hall, c.
Marketing contemporary concepts and practices / William F. Schoell ; Joseph P. Guiltinan. 6th ed.. Englewood Cliffs, NJ: Prentice-Hall, c, 1998. Buku Wajib.