Gaya APA

P.E., R, A, W. (1987). COMMUNICATION SYSTEMS ANALYSIS AND DESIGN: a systems approach . LONDON: Prentice-Hall Interational, Inc.

Gaya MLA

P.E., Richard, A., Williams,ph.D.,. "COMMUNICATION SYSTEMS ANALYSIS AND DESIGN: a systems approach". LONDON: Prentice-Hall Interational, Inc, 1987. Text.