Cita APA (7th ed.)

Friis, R. H. (2012). Essentials of environmental health (2nd ed.). Jones & Bartlett learning.

Cita Chicago (17th ed.)

Friis, Robert H. Essentials of Environmental Health. 2nd ed. Burlington: Jones & Bartlett learning, 2012.

Cita MLA (9th ed.)

Friis, Robert H. Essentials of Environmental Health. 2nd ed. Jones & Bartlett learning, 2012.