Pederson, C. A. (1981). Selling: Principles and methods. Richard D. Irwin.
Lua i Stíl Chicago (17ú heag.)Pederson, Carlton A. Selling: Principles and Methods. Homewood, Ill.: Richard D. Irwin, 1981.
Lua MLA (9ú heag.)Pederson, Carlton A. Selling: Principles and Methods. Richard D. Irwin, 1981.
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