Dyfyniad APA
Davis, M. L. (2014). Principles of environmental engineering and science (3rd ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
Davis, Mackenzie L. Principles of Environmental Engineering and Science. 3rd ed. New York: McGraw-Hill, 2014.
Dyfyniad MLA
Davis, Mackenzie L. Principles of Environmental Engineering and Science. 3rd ed. McGraw-Hill, 2014.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.