APA

Ehlers V. M., Steel E. W., . (1965). Municipal and rural sanitation. New York: McGraw-Hill.

Chicago

Ehlers Victor Marcus, Steel Ernest William, . 1965. Municipal and rural sanitation. New York: McGraw-Hill.

Harvard

Ehlers V. M., Steel E. W., . (1965). Municipal and rural sanitation. New York: McGraw-Hill.

MLA

Ehlers Victor Marcus, Steel Ernest William, . Municipal and rural sanitation. New York: McGraw-Hill. 1965.