APA Style
Orwel, George. (2006).
The New Frontier in Oil for Investors: Black Gold .
New Jersey: John Willey & Sons:
New Jersey: John Willey & Sons.
Chicago Style
Orwel, George.
The New Frontier in Oil for Investors: Black Gold.
New Jersey: John Willey & Sons:
New Jersey: John Willey & Sons,
2006.
Buku.
MLA Style
Orwel, George.
The New Frontier in Oil for Investors: Black Gold.
New Jersey: John Willey & Sons:
New Jersey: John Willey & Sons,
2006.
Buku.
Turabian Style
Orwel, George.
The New Frontier in Oil for Investors: Black Gold.
New Jersey: John Willey & Sons:
New Jersey: John Willey & Sons,
2006.
Buku.