Gaya APA
Dewi, R. (2010).
Energy Resource How its Formed And How It Is Used Oil & Gas Explorations .
Jakarta:
Pustaka Lebah.
Gaya MLA
Dewi, Ratih.
"Energy Resource How its Formed And How It Is Used Oil & Gas Explorations".
Jakarta:
Pustaka Lebah,
2010.
Text.