CCITT & International Telegraph and Telephone Consultative Committee. (1981). VIIth Plenary Assembly. International Telecommunication Union.
Citace podle Chicago (17th ed.)CCITT a International Telegraph and Telephone Consultative Committee. VIIth Plenary Assembly. Ginebra: International Telecommunication Union, 1981.
Citace podle MLA (9th ed.)CCITT a International Telegraph and Telephone Consultative Committee. VIIth Plenary Assembly. International Telecommunication Union, 1981.
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