Dyfyniad APA

Friis, R. H., & Sellers, T. A. (2014). Epidemiology for public health practice (5th ed.). Jones & Bartlett Learning.

Dyfyniad Arddull Chicago

Friis, Robert H., and Thomas A. Sellers. Epidemiology for Public Health Practice. 5th ed. Burlington, Mass.: Jones & Bartlett Learning, 2014.

Dyfyniad MLA

Friis, Robert H., and Thomas A. Sellers. Epidemiology for Public Health Practice. 5th ed. Jones & Bartlett Learning, 2014.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.