Weihrich, H. Management: A Global and Entrepreneurial Perspective (13th.). McGraw Hill.
Lua i Stíl Chicago (17ú heag.)Weihrich, Heinz. Management: A Global and Entrepreneurial Perspective. 13th. McGraw Hill.
Lua MLA (9ú heag.)Weihrich, Heinz. Management: A Global and Entrepreneurial Perspective. 13th. McGraw Hill.
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