APA

American Petroleum Institute A., . (2007). Recommended practice for field analysis of crude oil samples containing from to fifty percent water by volume. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 2007. Recommended practice for field analysis of crude oil samples containing from to fifty percent water by volume. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (2007). Recommended practice for field analysis of crude oil samples containing from to fifty percent water by volume. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Recommended practice for field analysis of crude oil samples containing from to fifty percent water by volume. Washington: American Petroleum Institute, API. 2007.