Lua APA (7ú heag.)

YUKL, G. A. (1989). Leadership in organizations.-- ed.2. Prentice Hall.

Lua i Stíl Chicago (17ú heag.)

YUKL, Gary A. Leadership in Organizations.-- Ed.2. New Jersey: Prentice Hall, 1989.

Lua MLA (9ú heag.)

YUKL, Gary A. Leadership in Organizations.-- Ed.2. Prentice Hall, 1989.

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