APA

Garrett R. S., Library of Congress, . (2020). Candidates, groups, and the campaign finance environment: a brief overview. [Washington, D.C.]: Congressional Research Service.

Chicago

Garrett R Sam, Library of Congress, . 2020. Candidates, groups, and the campaign finance environment: a brief overview. [Washington, D.C.]: Congressional Research Service.

Harvard

Garrett R. S., Library of Congress, . (2020). Candidates, groups, and the campaign finance environment: a brief overview. [Washington, D.C.]: Congressional Research Service.

MLA

Garrett R Sam, Library of Congress, . Candidates, groups, and the campaign finance environment: a brief overview. [Washington, D.C.]: Congressional Research Service. 2020.