APA

American Petroleum Institute A., . (1970). Expenditures for fuel products desulfurization. New York: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 1970. Expenditures for fuel products desulfurization. New York: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (1970). Expenditures for fuel products desulfurization. New York: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Expenditures for fuel products desulfurization. New York: American Petroleum Institute, API. 1970.