Não informado. (2021). Communications Engineering & Design. International Thomson Communication.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Communications Engineering & Design. Denver, Colo: International Thomson Communication, 2021.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Communications Engineering & Design. International Thomson Communication, 2021.
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