Gaya APA
Alam, W, T.
(2011).
Freeport papua, blok cepu, gas alam arun
.
Jakarta:
Ufuk Press.
Gaya MLA
Alam, Wawan, Tunggul.
"Freeport papua, blok cepu, gas alam arun".
Jakarta:
Ufuk Press,
2011.
.