Gaya APA

Bytheway, B, S, S, M, C, E, J, W, A. (2001). the Essence Information Systems/Sistem Informasi (Pertama). Yogyakarta: .

Gaya MLA

Bytheway, Budi, Sutedjo,, S.Kom.,, MM/, Chris, Edwards,, Jhon, Ward,, Andy. "the Essence Information Systems/Sistem Informasi". Pertama Yogyakarta: , 2001. Text.