Schoell, W. F. (1988). Marketing: Contemporary concepts and practices (3ª ed.). Allyn and Bacon.
Cita Chicago (17th ed.)Schoell, William F. Marketing: Contemporary Concepts and Practices. 3ª ed. Allyn and Bacon, 1988.
Cita MLA (9th ed.)Schoell, William F. Marketing: Contemporary Concepts and Practices. 3ª ed. Allyn and Bacon, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.