APA

American Petroleum Institute A., . (2019). Repair and remanufacture of wellhead and tree equipment. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 2019. Repair and remanufacture of wellhead and tree equipment. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (2019). Repair and remanufacture of wellhead and tree equipment. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Repair and remanufacture of wellhead and tree equipment. Washington: American Petroleum Institute, API. 2019.