APA

American Petroleum Institute A., . (1985). Drill pipe/casing protectors (DP/CP). Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 1985. Drill pipe/casing protectors (DP/CP). Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (1985). Drill pipe/casing protectors (DP/CP). Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Drill pipe/casing protectors (DP/CP). Washington: American Petroleum Institute, API. 1985.