APA

United States Capitol Visitor Center (Washington D., . (2013). The House of Representatives and Senate: what's the difference?. [Washington, D.C.]: U.S. Capitol Visitor Center.

Chicago

United States Capitol Visitor Center (Washington D.C.), . 2013. The House of Representatives and Senate: what's the difference?. [Washington, D.C.]: U.S. Capitol Visitor Center.

Harvard

United States Capitol Visitor Center (Washington D., . (2013). The House of Representatives and Senate: what's the difference?. [Washington, D.C.]: U.S. Capitol Visitor Center.

MLA

United States Capitol Visitor Center (Washington D.C.), . The House of Representatives and Senate: what's the difference?. [Washington, D.C.]: U.S. Capitol Visitor Center. 2013.