Davis, M. L., & Cornwell, D. A. (2008). Introduction to environmental engineering (4th ed.). Dubuque, IA: McGraw-Hill Companies.
استشهاد بنمط شيكاغوDavis, Mackenzie Leo, and David A. Cornwell. Introduction to Environmental Engineering. 4th ed. Dubuque, IA: McGraw-Hill Companies, 2008.
MLA استشهادDavis, Mackenzie Leo, and David A. Cornwell. Introduction to Environmental Engineering. 4th ed. Dubuque, IA: McGraw-Hill Companies, 2008.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.