Cita APA (7th ed.)

Yukl, G. A. (1989). Leadership in organizations (2nd ed.). Prentice Hall.

Cita Chicago (17th ed.)

Yukl, Gary A. Leadership in Organizations. 2nd ed. Englewood Cliffs, N.J: Prentice Hall, 1989.

Cita MLA (9th ed.)

Yukl, Gary A. Leadership in Organizations. 2nd ed. Prentice Hall, 1989.