Cita APA (7th ed.)

Hackman, M. Z., & Johnson, C. E. (2009). Leadership: A communication perspective (Fifth edition.). Waveland Press, Inc.

Cita Chicago (17th ed.)

Hackman, Michael Z., i Craig E. Johnson. Leadership: A Communication Perspective. Fifth edition. Long Grove, Illinois: Waveland Press, Inc, 2009.

Cita MLA (9th ed.)

Hackman, Michael Z., i Craig E. Johnson. Leadership: A Communication Perspective. Fifth edition. Waveland Press, Inc, 2009.