APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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