Gayler, W. (1989). Telephone voice transmission: Standards and measurement. Prentice Hall.
Chicago Style aipamenaGayler, Winston. Telephone Voice Transmission: Standards and Measurement. Englewood Cliffs, N.J.: Prentice Hall, 1989.
MLA aipamenaGayler, Winston. Telephone Voice Transmission: Standards and Measurement. Prentice Hall, 1989.
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