APA (7th ed.) Citation

Pirog, R. L. (2012). Financial performance of the major oil companies, 2007-2011. Congressional Research Service.

Chicago Style (17th ed.) Citation

Pirog, Robert L. Financial Performance of the Major Oil Companies, 2007-2011. [Washington, District of Columbia]: Congressional Research Service, 2012.

MLA (9th ed.) Citation

Pirog, Robert L. Financial Performance of the Major Oil Companies, 2007-2011. Congressional Research Service, 2012.