Gaya APA

Bower, S, A., Bower, G, H. (1991). Asserting yourself : a practical guide for positive change (Updated ed). New York: Addison-Wesley.

Gaya MLA

Bower, Sharon, Anthony., Bower, Gordon, H.. "Asserting yourself : a practical guide for positive change". Updated ed New York: Addison-Wesley, 1991. Text.