APA
American Petroleum Institute A., . (2011). Gas turbines for the petroleum, chemical, and gas industry services. Washington: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 2011. Gas turbines for the petroleum, chemical, and gas industry services. Washington: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (2011). Gas turbines for the petroleum, chemical, and gas industry services. Washington: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . Gas turbines for the petroleum, chemical, and gas industry services. Washington: American Petroleum Institute, API. 2011.