Style de citation APA (7e éd.)

Sundel, S. S., & Sundel, M. (1980). Be assertive: A practical guide for human service workers. Sage Publications.

Style de citation Chicago (17e éd.)

Sundel, Sandra Stone, et Martin Sundel. Be Assertive: A Practical Guide for Human Service Workers. Beverly Hills: Sage Publications, 1980.

Style de citation MLA (8e éd.)

Sundel, Sandra Stone, et Martin Sundel. Be Assertive: A Practical Guide for Human Service Workers. Sage Publications, 1980.