APA (7th ed.) Citation

Humphrey, W. S. (2005). PSP: A self-improvement process for software engineers. Addison-Wesley.

Chicago Style (17th ed.) Citation

Humphrey, Watts S. PSP: A Self-improvement Process for Software Engineers. Upper Saddle River, NJ: Addison-Wesley, 2005.

MLA (8th ed.) Citation

Humphrey, Watts S. PSP: A Self-improvement Process for Software Engineers. Addison-Wesley, 2005.