Gaya APA

Edwards, C., Ward, J. (2001). Sistem informasi = the essence of information systems (Ed.1; Cet.1). Yogyakarta: Andi.

Gaya MLA

Edwards, Chris., Ward, John. "Sistem informasi = the essence of information systems". Ed.1; Cet.1 Yogyakarta: Andi, 2001. Text.