Gaya APA

INC, M, &, E. (1991). WASTEWATER ENGINEERING: TREATMENT, DISPOSAL AND REUSE (3 rd). New York: MCGRAW-HILL, New York.

Gaya MLA

INC, METCALF, &, EDDY,. "WASTEWATER ENGINEERING: TREATMENT, DISPOSAL AND REUSE". 3 rd New York: MCGRAW-HILL, New York, 1991. Textbook.