Cita APA (7th ed.)

DAVIS, M. L., & CORNWELL, D. A. (1991). Introduction to environmental engineering.-- ed.2. McGraw-Hill Inc.

Cita Chicago (17th ed.)

DAVIS, Mackenzie L., i David A. CORNWELL. Introduction to Environmental Engineering.-- Ed.2. New York: McGraw-Hill Inc, 1991.

Cita MLA (9th ed.)

DAVIS, Mackenzie L., i David A. CORNWELL. Introduction to Environmental Engineering.-- Ed.2. McGraw-Hill Inc, 1991.