Cita APA (7a ed.)

Walworth Company. (1957). Walworth :valves and pipe fittings: Catálog 57. Walworth Company.

Cita Chicago Style (17a ed.)

Walworth Company. Walworth :valves and Pipe Fittings: Catálog 57. New York: Walworth Company, 1957.

Cita MLA (8a ed.)

Walworth Company. Walworth :valves and Pipe Fittings: Catálog 57. Walworth Company, 1957.