APA
American Petroleum Institute A., . (2020). Inspection and classification of used drill stem elements. Washington: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 2020. Inspection and classification of used drill stem elements. Washington: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (2020). Inspection and classification of used drill stem elements. Washington: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . Inspection and classification of used drill stem elements. Washington: American Petroleum Institute, API. 2020.