APA

Petersen R. E., Library of Congress, . (2019). Roles and duties of a member of Congress: brief overview. [Washington, D.C.]: Congressional Research Service.

Chicago

Petersen R Eric, Library of Congress, . 2019. Roles and duties of a member of Congress: brief overview. [Washington, D.C.]: Congressional Research Service.

Harvard

Petersen R. E., Library of Congress, . (2019). Roles and duties of a member of Congress: brief overview. [Washington, D.C.]: Congressional Research Service.

MLA

Petersen R Eric, Library of Congress, . Roles and duties of a member of Congress: brief overview. [Washington, D.C.]: Congressional Research Service. 2019.