Spiro R T, S. R. L. (2013). Management of sales Force (11th.). Mc Graw Hill Education.
Cita Chicago (17th ed.)Spiro R T, Stanton R L. Management of Sales Force. 11th. New Delhi: Mc Graw Hill Education, 2013.
Cita MLA (9th ed.)Spiro R T, Stanton R L. Management of Sales Force. 11th. Mc Graw Hill Education, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.