APA (7th ed.) Citation

Carkhuff, R. R. (2009). The secrets of helping. HRD Press.

Chicago Style (17th ed.) Citation

Carkhuff, Robert R. The Secrets of Helping. Amherst, MA: HRD Press, 2009.

MLA (9th ed.) Citation

Carkhuff, Robert R. The Secrets of Helping. HRD Press, 2009.

Warning: These citations may not always be 100% accurate.