APA (7th ed.) Citation

Friis, R. H., & Sellers, T. A. (1999). Epidemiology for public health practice (2nd ed.). Aspen.

Chicago Style (17th ed.) Citation

Friis, Robert H., and Thomas A. Sellers. Epidemiology for Public Health Practice. 2nd ed. Gaithersburg, MD: Aspen, 1999.

MLA (9th ed.) Citation

Friis, Robert H., and Thomas A. Sellers. Epidemiology for Public Health Practice. 2nd ed. Aspen, 1999.