APA-referens (7:e uppl.)

Ehlers, V. M., & Steel, E. W. (1965). Municipal and rural sanitation (6th ed.). McGraw-Hill.

Chicago-referens (17:e uppl.)

Ehlers, Victor Marcus, och Ernest William Steel. Municipal and Rural Sanitation. 6th ed. New York: McGraw-Hill, 1965.

MLA-referens (9:e uppl.)

Ehlers, Victor Marcus, och Ernest William Steel. Municipal and Rural Sanitation. 6th ed. McGraw-Hill, 1965.