APA aipamena

Hale, G. A. (1996). The leader's edge: Mastering the five skills of breakthrough thinking. Burr Ridge, Ill: Irwin Professional Pub.

Chicago Style aipamena

Hale, Guy A. The Leader's Edge: Mastering the Five Skills of Breakthrough Thinking. Burr Ridge, Ill: Irwin Professional Pub, 1996.

MLA aipamena

Hale, Guy A. The Leader's Edge: Mastering the Five Skills of Breakthrough Thinking. Burr Ridge, Ill: Irwin Professional Pub, 1996.