Gaya APA
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.