Bartels, R. (1963). Ethics in business. Bureau of Business Research, College of Commerce and Administration, Ohio State University.
Lua i Stíl Chicago (17ú heag.)Bartels, Robert. Ethics in Business. Columbus: Bureau of Business Research, College of Commerce and Administration, Ohio State University, 1963.
Lua MLA (8ú heag.)Bartels, Robert. Ethics in Business. Bureau of Business Research, College of Commerce and Administration, Ohio State University, 1963.
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