Gaya APA

Muhammad, T, A, K., Mangunsukardjo, K. (1991). GIS applications for water, wastewater, and stormwater systems . Yogyakarta: Universitas Gadjah Mada.

Gaya MLA

Muhammad, Trias, Aditya, Kurniawan., Mangunsukardjo, Karmono. "GIS applications for water, wastewater, and stormwater systems". Yogyakarta: Universitas Gadjah Mada, 1991. Text.