APA
Erwin P. C., Brownson R. C., Scutchfield F. D. & Keck C. W. (2017). Scutchfield and Keck's principles of public health practice. Boston, MA, USA: Cengage Learning.
Chicago
Erwin Paul C, Brownson Ross C, Scutchfield F Douglas and Keck C William. 2017. Scutchfield and Keck's principles of public health practice. Boston, MA, USA: Cengage Learning.
Harvard
Erwin P. C., Brownson R. C., Scutchfield F. D. and Keck C. W. (2017). Scutchfield and Keck's principles of public health practice. Boston, MA, USA: Cengage Learning.
MLA
Erwin Paul C, Brownson Ross C, Scutchfield F Douglas and Keck C William. Scutchfield and Keck's principles of public health practice. Boston, MA, USA: Cengage Learning. 2017.