Zastrow, C., & Kirst-Ashman, K. K. (2001). Understanding human behavior and the social environment (Fifth edition.). Brooks/Cole, Thomson Learning.
Lua i Stíl Chicago (17ú heag.)Zastrow, Charles, agus Karen Kay Kirst-Ashman. Understanding Human Behavior and the Social Environment. Fifth edition. Belmont, California: Brooks/Cole, Thomson Learning, 2001.
Lua MLA (9ú heag.)Zastrow, Charles, agus Karen Kay Kirst-Ashman. Understanding Human Behavior and the Social Environment. Fifth edition. Brooks/Cole, Thomson Learning, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.