Covey, S. R. (2012). The 3rd alternative: Solving life's most difficult problems. Simon & Schuster UK.
Citace podle Chicago (17th ed.)Covey, Stephen R. The 3rd Alternative: Solving Life's Most Difficult Problems. London: Simon & Schuster UK, 2012.
Citace podle MLA (9th ed.)Covey, Stephen R. The 3rd Alternative: Solving Life's Most Difficult Problems. Simon & Schuster UK, 2012.
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