APA

American Petroleum Institute A., . (2001). Recommended practice for drilling and well servicing operations involving hydrogen sulfide. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 2001. Recommended practice for drilling and well servicing operations involving hydrogen sulfide. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (2001). Recommended practice for drilling and well servicing operations involving hydrogen sulfide. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Recommended practice for drilling and well servicing operations involving hydrogen sulfide. Washington: American Petroleum Institute, API. 2001.