Ellingstad, V., & Heimstra, N. W. (1974). Methods in the study of human behavior. Brooks/Cole.
Chicago-čujuhus (17. p.)Ellingstad, Vernon, juo Norman W. Heimstra. Methods in the Study of Human Behavior. Monterey: Brooks/Cole, 1974.
MLA-čujuhus (9. p.)Ellingstad, Vernon, juo Norman W. Heimstra. Methods in the Study of Human Behavior. Brooks/Cole, 1974.
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