APA (7th ed.) Citation

Walker, A., & Walker, A. (2004). The color purple: A memory book of the Broadway musical. Phoenix.

Chicago Style (17th ed.) Citation

Walker, Alice, and Alice Walker. The Color Purple: A Memory Book of the Broadway Musical. London: Phoenix, 2004.

MLA (8th ed.) Citation

Walker, Alice, and Alice Walker. The Color Purple: A Memory Book of the Broadway Musical. Phoenix, 2004.