APA

American Petroleum Institute, . (1980). Two energy futures: a national choice for the 80s. Washington, D.C: American Petroleum Institute.

Chicago

American Petroleum Institute, . 1980. Two energy futures: a national choice for the 80s. Washington, D.C: American Petroleum Institute.

Harvard

American Petroleum Institute, . (1980). Two energy futures: a national choice for the 80s. Washington, D.C: American Petroleum Institute.

MLA

American Petroleum Institute, . Two energy futures: a national choice for the 80s. Washington, D.C: American Petroleum Institute. 1980.