APA
American Petroleum Institute A., . (199). Training programs for operators in refineries and process industries. Houston, Texas: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 199. Training programs for operators in refineries and process industries. Houston, Texas: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (199). Training programs for operators in refineries and process industries. Houston, Texas: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . Training programs for operators in refineries and process industries. Houston, Texas: American Petroleum Institute, API. 199.