Cita APA (7th ed.)
Hill, M. K. (2004). Understanding environmental pollution: A primer (2nd ed.). Cambridge.
Cita Chicago (17th ed.)
Hill, Marquita K. Understanding Environmental Pollution: A Primer. 2nd ed. Cambridge, UK ; New York: Cambridge, 2004.
Cita MLA (9th ed.)
Hill, Marquita K. Understanding Environmental Pollution: A Primer. 2nd ed. Cambridge, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.