APA

Lawson A. J., Library of Congress, . (2020). A brief history of U.S. electricity portfolio standard proposals. [Washington, D.C.]: Congressional Research Service.

Chicago

Lawson Ashley J, Library of Congress, . 2020. A brief history of U.S. electricity portfolio standard proposals. [Washington, D.C.]: Congressional Research Service.

Harvard

Lawson A. J., Library of Congress, . (2020). A brief history of U.S. electricity portfolio standard proposals. [Washington, D.C.]: Congressional Research Service.

MLA

Lawson Ashley J, Library of Congress, . A brief history of U.S. electricity portfolio standard proposals. [Washington, D.C.]: Congressional Research Service. 2020.