Hoffman, M. D. (1987). Foodservice distributor sales representative: Training and development. Cornell University.
Lua i Stíl Chicago (17ú heag.)Hoffman, Michael D. Foodservice Distributor Sales Representative: Training and Development. New York: Cornell University, 1987.
Lua MLA (8ú heag.)Hoffman, Michael D. Foodservice Distributor Sales Representative: Training and Development. Cornell University, 1987.
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