Harvey, C. (1992). Selling in a week. Hodder & Stoughton.
Cita Chicago (17th ed.)Harvey, Christine. Selling in a Week. London: Hodder & Stoughton, 1992.
Cita MLA (8th ed.)Harvey, Christine. Selling in a Week. Hodder & Stoughton, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.