Παραπομπή APA
Sayles, L. R. (1979). Leadership: What effective managers really do ... and how they do it. New York: McGraw-Hill.
Παραπομπή Chicago StyleSayles, Leonard R. Leadership: What Effective Managers Really Do ... and How They Do It. New York: McGraw-Hill, 1979.
Παραπομπή MLASayles, Leonard R. Leadership: What Effective Managers Really Do ... and How They Do It. New York: McGraw-Hill, 1979.
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