Gaya APA

Doty, L, A., J.Tocci, R. (1991). Digital Systems Principles and Applications (5 ed). United States of America: Prentce Hall Internatonal, Inc.

Gaya MLA

Doty, Leornad, A., J.Tocci, Ronald. "Digital Systems Principles and Applications". 5 ed United States of America: Prentce Hall Internatonal, Inc, 1991. Text.