APA
American Petroleum Institute A., . (2019). Operation, inspection, maintenance, and repair of drilling and well servicing structures. Washington: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 2019. Operation, inspection, maintenance, and repair of drilling and well servicing structures. Washington: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (2019). Operation, inspection, maintenance, and repair of drilling and well servicing structures. Washington: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . Operation, inspection, maintenance, and repair of drilling and well servicing structures. Washington: American Petroleum Institute, API. 2019.