APA Style

Couch, L, W. (2007-04-15T12:35:44+). Digital and Analog Communication Systems (7th Edition). : Pearson/Prentice Hall.

MLA Style

Couch, Leon, W.. "Digital and Analog Communication Systems". 7th Edition : Pearson/Prentice Hall, 2007-04-15T12:35:44+. Book.