O'Neil, S. L. (2006). Your attitude is showing (11th ed.). Pearson Education.
Citace podle Chicago (17th ed.)O'Neil, Sharon Lund. Your Attitude Is Showing. 11th ed. Upper Saddle River, New Jersey: Pearson Education, 2006.
Citace podle MLA (9th ed.)O'Neil, Sharon Lund. Your Attitude Is Showing. 11th ed. Pearson Education, 2006.
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