APA Format
Ehlers, Victor M.
; Steel, Ernest W.
. (1958, 1965). Municipal and rural sanitation. New York : McGraw-Hill
MLA Format
Ehlers, Victor M.; Steel, Ernest W.
. Municipal and rural sanitation. New York : McGraw-Hill, 1958, 1965
Australian/Harvard Format
Ehlers, Victor M.
; Steel, Ernest W.
. 1958, 1965. Municipal and rural sanitation. McGraw-Hill, New York
Warning: These citations may not always be 100% accurate.