APA-viite (7. p.)
Norlin, J. M., Chess, W. A., Dale, O., & Smith, R. (2003). Human behavior and the social environment: Social systems theory (4th ed.). Pearson Education.
Chicago-viite (17. p.)
Norlin, Julia M., Wayne A. Chess, Orren Dale, ja Rebecca Smith. Human Behavior and the Social Environment: Social Systems Theory. 4th ed. Boston: Pearson Education, 2003.
MLA-viite (9. p.)
Norlin, Julia M., et al. Human Behavior and the Social Environment: Social Systems Theory. 4th ed. Pearson Education, 2003.
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