APA

American Petroleum Institute A., Bechtel Corporation & Bechtel Corporation. (1967). Desulfurization costs residual fuel oil. New York: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, Bechtel Corporation and Bechtel Corporation. 1967. Desulfurization costs residual fuel oil. New York: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., Bechtel Corporation and Bechtel Corporation. (1967). Desulfurization costs residual fuel oil. New York: American Petroleum Institute, API.

MLA

American Petroleum Institute API, Bechtel Corporation and Bechtel Corporation. Desulfurization costs residual fuel oil. New York: American Petroleum Institute, API. 1967.