Cita APA

Ehlers, V. M., & Steel, E. W. (1937). Municipal and rural sanitation (2a ed.). New York: McGraw-Hill.

Citación estilo Chicago

Ehlers, Victor M., y Ernest W. Steel. Municipal and Rural Sanitation. 2a ed. New York: McGraw-Hill, 1937.

Cita MLA

Ehlers, Victor M., y Ernest W. Steel. Municipal and Rural Sanitation. 2a ed. New York: McGraw-Hill, 1937.