Summers, C. K. (1995). ISDN implementor's guide: Standards, protocols, & services. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Summers, Charles K. ISDN Implementor's Guide: Standards, Protocols, & Services. New York: McGraw-Hill, 1995.
Lua MLA (8ú heag.)Summers, Charles K. ISDN Implementor's Guide: Standards, Protocols, & Services. McGraw-Hill, 1995.
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