Cita APA (7th ed.)

Coyle, A. F. (1997). Leadership: The ASTD trainer's sourcebook. McGraw-Hill.

Cita Chicago (17th ed.)

Coyle, Anne F. Leadership: The ASTD Trainer's Sourcebook. New York: McGraw-Hill, 1997.

Cita MLA (9th ed.)

Coyle, Anne F. Leadership: The ASTD Trainer's Sourcebook. McGraw-Hill, 1997.