Cita APA

McCallum, G. E., Holy, W. E., & Ludwig, H. (1952). A safe water supply in civil disaster.

Citación estilo Chicago

McCallum, Gordon E., William E. Holy, y Harvey Ludwig. A Safe Water Supply in Civil Disaster. 1952.

Cita MLA

McCallum, Gordon E., William E. Holy, y Harvey Ludwig. A Safe Water Supply in Civil Disaster. 1952.