COUCH LEON W. (2009). DIGITAL AND ANALOG COMMUNICATION SYSTEMS 7TH ED (7TH ED.). PEARSON EDUCATION.
Chicago-referens (17:e uppl.)COUCH LEON W. DIGITAL AND ANALOG COMMUNICATION SYSTEMS 7TH ED. 7TH ED. INDIA: PEARSON EDUCATION, 2009.
MLA-referens (9:e uppl.)COUCH LEON W. DIGITAL AND ANALOG COMMUNICATION SYSTEMS 7TH ED. 7TH ED. PEARSON EDUCATION, 2009.
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