Tohutoro APA (7th ed.)
Sundel, S. S., & Sundel, M. (1980). Be assertive: A practical guide for human service workers. Sage Publications.
Tohutoru Kātū Chicago (17th ed.)
Sundel, Sandra Stone, me Martin Sundel. Be Assertive: A Practical Guide for Human Service Workers. Beverly Hills: Sage Publications, 1980.
Tohutoro MLA (9th ed.)
Sundel, Sandra Stone, me Martin Sundel. Be Assertive: A Practical Guide for Human Service Workers. Sage Publications, 1980.
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