Bigelow, S. J., Carr, J. J., & Winder, S. (2001). Understanding telephone electronics (4rth ed.). Newnes.
Lua i Stíl Chicago (17ú heag.)Bigelow, Stephen J., Joseph J. Carr, agus Steve Winder. Understanding Telephone Electronics. 4rth ed. Boston: Newnes, 2001.
Lua MLA (8ú heag.)Bigelow, Stephen J., et al. Understanding Telephone Electronics. 4rth ed. Newnes, 2001.
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