Cita APA (7th ed.)
Friis, R. H. (2019). Essentials of environmental health (3rd ed.). Jones & Bartlett Learning.
Cita Chicago (17th ed.)
Friis, Robert H. Essentials of Environmental Health. 3rd ed. Burlington, MA: Jones & Bartlett Learning, 2019.
Cita MLA (9th ed.)
Friis, Robert H. Essentials of Environmental Health. 3rd ed. Jones & Bartlett Learning, 2019.
Atenció: Aquestes cites poden no estar 100% correctes.