APA (7th ed.) Citation

Kushel, G. (1994). Reaching the peak performance zone: How to motivate yourself and others to excel. AMACOM.

Chicago Style (17th ed.) Citation

Kushel, Gerald. Reaching the Peak Performance Zone: How to Motivate Yourself and Others to Excel. New York: AMACOM, 1994.

MLA (9th ed.) Citation

Kushel, Gerald. Reaching the Peak Performance Zone: How to Motivate Yourself and Others to Excel. AMACOM, 1994.