Clawson, J. G. (2009). Level three leadership: Getting below the surface (4th ed.). Pearson/Prentice Hall.
Citace podle Chicago (17th ed.)Clawson, James G. Level Three Leadership: Getting Below the Surface. 4th ed. Upper Saddle River, N.J: Pearson/Prentice Hall, 2009.
Citace podle MLA (9th ed.)Clawson, James G. Level Three Leadership: Getting Below the Surface. 4th ed. Pearson/Prentice Hall, 2009.
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