Dyfyniad APA

Zastrow Charles & Kirst-Ashman, K. K. (1990). Understanding human behavior and the social environment (Second edition.). Nelson-Hall Publishers.

Dyfyniad Arddull Chicago

Zastrow Charles and Karen Kay Kirst-Ashman. Understanding Human Behavior and the Social Environment. Second edition. Chicago: Nelson-Hall Publishers, 1990.

Dyfyniad MLA

Zastrow Charles and Karen Kay Kirst-Ashman. Understanding Human Behavior and the Social Environment. Second edition. Nelson-Hall Publishers, 1990.

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