Gaya APA

S.VALACICH, J. (2012). ESSENTIALS OF SYSTEMS ANALYSIS & DESIGN (ED.5). AMERICA: PRENTICE HALL INTERNATIONAL.

Gaya MLA

S.VALACICH, JOSEPH. "ESSENTIALS OF SYSTEMS ANALYSIS & DESIGN". ED.5 AMERICA: PRENTICE HALL INTERNATIONAL, 2012. Text.