Gaya APA

speight, J, G. (2011). An introduction to petroleum technology, economics, and politics (2011). New York: New York : John Wiley & Sons, Inc.,.

Gaya MLA

speight, James, G. "An introduction to petroleum technology, economics, and politics". 2011 New York: New York : John Wiley & Sons, Inc.,, 2011. Text.