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Gaya APA
Utomo, P, A.(2006).Membangun Aplikasi WAP Portal untuk Instansi/ Lembaga .Yogyakarta:Andi.
Gaya MLA
Utomo, Prasetya, Ambang."Membangun Aplikasi WAP Portal untuk Instansi/ Lembaga".Yogyakarta:Andi,2006.Text.