APA

American Petroleum Institute A., . (1997). Recommended practices for blowout prevention equipment systems for drilling wells. 53. 3rd ed. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 1997. Recommended practices for blowout prevention equipment systems for drilling wells. 53. 3rd ed. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (1997). Recommended practices for blowout prevention equipment systems for drilling wells. 53. 3rd ed. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Recommended practices for blowout prevention equipment systems for drilling wells. 53. 3rd ed. Washington: American Petroleum Institute, API. 1997.