APA
American Petroleum Institute A., . (2015). Design, installation, operation, test, and redress of subsurface safety valve systems. Washington: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 2015. Design, installation, operation, test, and redress of subsurface safety valve systems. Washington: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (2015). Design, installation, operation, test, and redress of subsurface safety valve systems. Washington: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . Design, installation, operation, test, and redress of subsurface safety valve systems. Washington: American Petroleum Institute, API. 2015.