APA
American Petroleum Institute A., . (2012). Recommended practice for the repair and remanufacture of pipeline valves. Washington: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 2012. Recommended practice for the repair and remanufacture of pipeline valves. Washington: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (2012). Recommended practice for the repair and remanufacture of pipeline valves. Washington: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . Recommended practice for the repair and remanufacture of pipeline valves. Washington: American Petroleum Institute, API. 2012.