APA (7th ed.) Citation
Steinmetz, W., & Ward, B. (2008). Wicked cool PHP: Real-world scripts that make difficult things possible. No Starch Press.
Chicago Style (17th ed.) Citation
Steinmetz, William, and Brian Ward. Wicked Cool PHP: Real-world Scripts That Make Difficult Things Possible. San Francisco: No Starch Press, 2008.
MLA (9th ed.) Citation
Steinmetz, William, and Brian Ward. Wicked Cool PHP: Real-world Scripts That Make Difficult Things Possible. No Starch Press, 2008.
Warning: These citations may not always be 100% accurate.