APA

American Petroleum Institute A., . (1990). Petroleum release decision framework (PRDF). Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 1990. Petroleum release decision framework (PRDF). Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (1990). Petroleum release decision framework (PRDF). Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Petroleum release decision framework (PRDF). Washington: American Petroleum Institute, API. 1990.