Bower, S. A., & Bower, G. H. (1991). Asserting yourself: A practical guide for positive change (Updated edition.). Addison-Wesley.
Citace podle Chicago (17th ed.)Bower, Sharon Anthony, a Gordon H. Bower. Asserting Yourself: A Practical Guide for Positive Change. Updated edition. Reading, Mass: Addison-Wesley, 1991.
Citace podle MLA (9th ed.)Bower, Sharon Anthony, a Gordon H. Bower. Asserting Yourself: A Practical Guide for Positive Change. Updated edition. Addison-Wesley, 1991.
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