APA
Couch L. W., . (2014). Digital and analog communication systems. 8th ed. Pearson: New Delhi.
Chicago
Couch Leon W, . 2014. Digital and analog communication systems. 8th ed. Pearson: New Delhi.
Harvard
Couch L. W., . (2014). Digital and analog communication systems. 8th ed. Pearson: New Delhi.
MLA
Couch Leon W, . Digital and analog communication systems. 8th ed. Pearson: New Delhi. 2014.