Gaya APA
Ehlers, Victor M., Steel, Ernest W.. (1976).
Municipal and Rural Sanitation (Ed. 6, Cet. 1).
New York:
McGraw-Hill.
Gaya Chicago
Ehlers, Victor M., Steel, Ernest W..
Municipal and Rural Sanitation.
Ed. 6, Cet. 1
New York:
McGraw-Hill,
1976.
Textbook.
Gaya MLA
Ehlers, Victor M., Steel, Ernest W..
Municipal and Rural Sanitation.
Ed. 6, Cet. 1
New York:
McGraw-Hill,
1976.
Textbook.
Gaya Turabian
Ehlers, Victor M., Steel, Ernest W..
Municipal and Rural Sanitation.
Ed. 6, Cet. 1
New York:
McGraw-Hill,
1976.
Textbook.