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. Sudbury, MA: Jones & Bartlett Learning, 2012.

Cita MLA (8th ed.)

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