Spiro R T, S. R. L. (2013). Management of sales Force (11th.). Mc Graw Hill Education.
Chicago-čujuhus (17. p.)Spiro R T, Stanton R L. Management of Sales Force. 11th. New Delhi: Mc Graw Hill Education, 2013.
MLA-čujuhus (9. p.)Spiro R T, Stanton R L. Management of Sales Force. 11th. Mc Graw Hill Education, 2013.
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