Cita APA

American Standard. (1939). Wrought-iron and wroughht-steel pipe. American Standard Association.

Citación estilo Chicago

American Standard. Wrought-iron and Wroughht-steel Pipe. New York: American Standard Association, 1939.

Cita MLA

American Standard. Wrought-iron and Wroughht-steel Pipe. New York: American Standard Association, 1939.