APA
American Petroleum Institute A., . (2002). Centrifugal fans for petroleum, chemical and gas industry services. Washington: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 2002. Centrifugal fans for petroleum, chemical and gas industry services. Washington: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (2002). Centrifugal fans for petroleum, chemical and gas industry services. Washington: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . Centrifugal fans for petroleum, chemical and gas industry services. Washington: American Petroleum Institute, API. 2002.