APA

Friis R. H., Sellers T. A., . (2009). Epidemiology for public health practice. Boston: Jones and Bartlett.

Chicago

Friis Robert H, Sellers Thomas A, . 2009. Epidemiology for public health practice. Boston: Jones and Bartlett.

Harvard

Friis R. H., Sellers T. A., . (2009). Epidemiology for public health practice. Boston: Jones and Bartlett.

MLA

Friis Robert H, Sellers Thomas A, . Epidemiology for public health practice. Boston: Jones and Bartlett. 2009.