Smale, P. (1983). Telecommunication Systems (2nd ed.). A H Wheeler Company & Limited.
Tohutoru Kātū Chicago (17th ed.)Smale, PH. Telecommunication Systems. 2nd ed. London: A H Wheeler Company & Limited, 1983.
Tohutoro MLA (9th ed.)Smale, PH. Telecommunication Systems. 2nd ed. A H Wheeler Company & Limited, 1983.
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