Schoell, W. F. (1985). Marketing; Contemporary Concepts and Practices (2nd ed.). Allyn and Bacon.
Lua i Stíl Chicago (17ú heag.)Schoell, William F. Marketing; Contemporary Concepts and Practices. 2nd ed. Boston: Allyn and Bacon, 1985.
Lua MLA (9ú heag.)Schoell, William F. Marketing; Contemporary Concepts and Practices. 2nd ed. Allyn and Bacon, 1985.
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