APA
American Petroleum Institute A., . (2021). Steel globe valves-Flanged and butt-welding ends, bolted bonnets. Washington: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 2021. Steel globe valves-Flanged and butt-welding ends, bolted bonnets. Washington: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (2021). Steel globe valves-Flanged and butt-welding ends, bolted bonnets. Washington: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . Steel globe valves-Flanged and butt-welding ends, bolted bonnets. Washington: American Petroleum Institute, API. 2021.