APA

American Petroleum Institute A., . (2020). Guidelines for design and manufacture of surface wellhead running, retrieving and testing tools, cean-out tools and wear bushings. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 2020. Guidelines for design and manufacture of surface wellhead running, retrieving and testing tools, cean-out tools and wear bushings. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (2020). Guidelines for design and manufacture of surface wellhead running, retrieving and testing tools, cean-out tools and wear bushings. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Guidelines for design and manufacture of surface wellhead running, retrieving and testing tools, cean-out tools and wear bushings. Washington: American Petroleum Institute, API. 2020.