APA
American Petroleum Institute A., . (2003). Safe hot tapping practices in the petroleum & petrochemical industries. Washington: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 2003. Safe hot tapping practices in the petroleum & petrochemical industries. Washington: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (2003). Safe hot tapping practices in the petroleum & petrochemical industries. Washington: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . Safe hot tapping practices in the petroleum & petrochemical industries. Washington: American Petroleum Institute, API. 2003.