Gaya APA
Why?environment=lingkungan. (2010).
Indonesia:
Gagasmedia.
Gaya Chicago
Why?environment=lingkungan.
.
Indonesia:
Gagasmedia,
2010.
Text.
Gaya MLA
Why?environment=lingkungan.
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Indonesia:
Gagasmedia,
2010.
Text.
Gaya Turabian
Why?environment=lingkungan.
Indonesia:
Gagasmedia,
2010.
Print.