Mackintosh, C. H. (1923). Creative selling, making and keeping customers. D. Appleton.
Cita Chicago (17th ed.)Mackintosh, Charles Henry. Creative Selling, Making and Keeping Customers. New York: D. Appleton, 1923.
Cita MLA (9th ed.)Mackintosh, Charles Henry. Creative Selling, Making and Keeping Customers. D. Appleton, 1923.
Atenció: Aquestes cites poden no estar 100% correctes.