APA

American Petroleum Institute A., . (1992). Management practices, self assessment process, and resource materials. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 1992. Management practices, self assessment process, and resource materials. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (1992). Management practices, self assessment process, and resource materials. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Management practices, self assessment process, and resource materials. Washington: American Petroleum Institute, API. 1992.