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Gaya APA
Prevention Of Pollution. (2000).
Jakarta:
Badan Diklat Perhubungan.
Gaya Chicago
Prevention Of Pollution.
.
Jakarta:
Badan Diklat Perhubungan,
2000.
Text.
Gaya MLA
Prevention Of Pollution.
.
Jakarta:
Badan Diklat Perhubungan,
2000.
Text.
Gaya Turabian
Prevention Of Pollution.
Jakarta:
Badan Diklat Perhubungan,
2000.
Print.