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Jurnal of the Enviromental Engineering division. (1989). Malang Kota: America Societi.

Gaya Chicago

Jurnal of the Enviromental Engineering division. . Malang Kota: America Societi, 1989. Text.

Gaya MLA

Jurnal of the Enviromental Engineering division. . Malang Kota: America Societi, 1989. Text.

Gaya Turabian

Jurnal of the Enviromental Engineering division. Malang Kota: America Societi, 1989. Print.