APA
American Petroleum Institute A., . (2007). Fired heaters for general refinery services. Washington: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 2007. Fired heaters for general refinery services. Washington: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (2007). Fired heaters for general refinery services. Washington: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . Fired heaters for general refinery services. Washington: American Petroleum Institute, API. 2007.