APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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