APA (7th ed.) Citation

GORDON. (2005). Do you know the real you?: More than 66 ways to understand your personality. Penguin Book.

Chicago Style (17th ed.) Citation

GORDON. Do You Know the Real You?: More than 66 Ways to Understand Your Personality. New York: Penguin Book, 2005.

MLA (9th ed.) Citation

GORDON. Do You Know the Real You?: More than 66 Ways to Understand Your Personality. Penguin Book, 2005.