Dyfyniad APA

Davis, M. L. (2008). Introduction to environmental engineering (4t ed.). McGraw-Hill Companies.

Dyfyniad Arddull Chicago

Davis, Mackenzie L. Introduction to Environmental Engineering. 4t ed. Dubuque, IA: McGraw-Hill Companies, 2008.

Dyfyniad MLA

Davis, Mackenzie L. Introduction to Environmental Engineering. 4t ed. McGraw-Hill Companies, 2008.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.