Stryker, P. (1967). The incomparable salesmen: A study of the extraordinary life insurance agents in the Million Dollar Round Table, including the greatest salesmen in the business world. New York: McGraw-Hill.
Styl ChicagoStryker, Perrin. The Incomparable Salesmen: A Study of the Extraordinary Life Insurance Agents in the Million Dollar Round Table, Including the Greatest Salesmen in the Business World. New York: McGraw-Hill, 1967.
Citace podle MLAStryker, Perrin. The Incomparable Salesmen: A Study of the Extraordinary Life Insurance Agents in the Million Dollar Round Table, Including the Greatest Salesmen in the Business World. New York: McGraw-Hill, 1967.
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