Scutchfield, F. D., & Keck, C. W. (2009). Principles of public health practice (3rd ed.). Delmar, Cengage Learning.
Chicago-viite (17. p.)Scutchfield, F. Douglas, ja C. William Keck. Principles of Public Health Practice. 3rd ed. Clifton Park, NY: Delmar, Cengage Learning, 2009.
MLA-viite (8. p.)Scutchfield, F. Douglas, ja C. William Keck. Principles of Public Health Practice. 3rd ed. Delmar, Cengage Learning, 2009.
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