APA Style

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

Chicago Style

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

MLA Style

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

Turabian Style

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