APA Format
Tchobanoglous, George
; Burton, Franklin L.
. (1979; 1991). Wastewater engineering : treatment, disposal and reuse. New York : McGraw-Hill
MLA Format
Tchobanoglous, George; Burton, Franklin L.
. Wastewater engineering : treatment, disposal and reuse. New York : McGraw-Hill, 1979; 1991
Australian/Harvard Format
Tchobanoglous, George
; Burton, Franklin L.
. 1979; 1991. Wastewater engineering : treatment, disposal and reuse. McGraw-Hill, New York
Warning: These citations may not always be 100% accurate.