Hills, M. T. (1979). Telecommunications switching principles. MIT Press. https://doi.org/10.7551/mitpress/6706.001.0001
Lua i Stíl Chicago (17ú heag.)Hills, M. T. Telecommunications Switching Principles. Cambridge, Massachusetts: MIT Press, 1979. https://doi.org/10.7551/mitpress/6706.001.0001.
Lua MLA (9ú heag.)Hills, M. T. Telecommunications Switching Principles. MIT Press, 1979. https://doi.org/10.7551/mitpress/6706.001.0001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.