Darr, J. (1957). How to install & service intercommunication systems. J. F. Rider.
Lua i Stíl Chicago (17ú heag.)Darr, Jack. How to Install & Service Intercommunication Systems. New York: J. F. Rider, 1957.
Lua MLA (9ú heag.)Darr, Jack. How to Install & Service Intercommunication Systems. J. F. Rider, 1957.
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