APA (7th ed.) Citation

Sommer, C. (2006). Character under attack: What you can do about it (2nd ed., rev. and expanded.). Advance Pub.

Chicago Style (17th ed.) Citation

Sommer, Carl. Character Under Attack: What You Can Do About It. 2nd ed., rev. and expanded. Houston: Advance Pub, 2006.

MLA (9th ed.) Citation

Sommer, Carl. Character Under Attack: What You Can Do About It. 2nd ed., rev. and expanded. Advance Pub, 2006.