Darr, J. (1957). How to install & service intercommunication systems. J. F. Rider.
Cita Chicago (17th ed.)Darr, Jack. How to Install & Service Intercommunication Systems. New York: J. F. Rider, 1957.
Cita MLA (9th ed.)Darr, Jack. How to Install & Service Intercommunication Systems. J. F. Rider, 1957.
Atenció: Aquestes cites poden no estar 100% correctes.