Gaya APA

Bower, S, A., Bower, G, H. (1984). Asserting Yourself A Practical Guide for Positive Change (Cet.16). USA: Addison Wesley.

Gaya MLA

Bower, Sharon, Anthony., Bower, Gordon, H.. "Asserting Yourself A Practical Guide for Positive Change". Cet.16 USA: Addison Wesley, 1984. Buku PSI.