Helfrich, M. L. (1965). The social role of the executive's wife. Bureau of Business Research, Division of Research, College of Commerce and Administration, Ohio State University.
Lua i Stíl Chicago (17ú heag.)Helfrich, Margaret L. The Social Role of the Executive's Wife. Columbus: Bureau of Business Research, Division of Research, College of Commerce and Administration, Ohio State University, 1965.
Lua MLA (8ú heag.)Helfrich, Margaret L. The Social Role of the Executive's Wife. Bureau of Business Research, Division of Research, College of Commerce and Administration, Ohio State University, 1965.
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