APA
American Petroleum Institute A., . (1991). Global emissions of carbon dioxide from petroleum sources. Washington: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 1991. Global emissions of carbon dioxide from petroleum sources. Washington: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (1991). Global emissions of carbon dioxide from petroleum sources. Washington: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . Global emissions of carbon dioxide from petroleum sources. Washington: American Petroleum Institute, API. 1991.