Friis, R. H. (2012). Essentials of environmental health (2nd ed.). Jones & Bartlett Learning.
Chicago Style (17th ed.) CitationFriis, Robert H. Essentials of Environmental Health. 2nd ed. Sudbury, MA: Jones & Bartlett Learning, 2012.
MLA (8th ed.) CitationFriis, Robert H. Essentials of Environmental Health. 2nd ed. Jones & Bartlett Learning, 2012.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.