APA (7th ed.) Citation

International Telegraph and Telephone Consultative Committee. Plenary Assembly & International Telecommunication Union. (1981). Yellow book. International Telecommunication Union.

Chicago Style (17th ed.) Citation

International Telegraph and Telephone Consultative Committee. Plenary Assembly and International Telecommunication Union. Yellow Book. Geneva: International Telecommunication Union, 1981.

MLA (8th ed.) Citation

International Telegraph and Telephone Consultative Committee. Plenary Assembly and International Telecommunication Union. Yellow Book. International Telecommunication Union, 1981.