Deismireacht APA

International Telecommunication Union. (1979). What is ITU? Geneva: International Telecommunication Union.

Trích dẫn kiểu Chicago

International Telecommunication Union. What Is ITU? Geneva: International Telecommunication Union, 1979.

Deismireacht MLA

International Telecommunication Union. What Is ITU? Geneva: International Telecommunication Union, 1979.

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