Cita APA (7a ed.)
EUA. United States Congress : (91° Congress : 1969). (1969). Congressional Pictorial Directory: January 1969. Government Printing Office.
Cita estilo Chicago (17a ed.)
EUA. United States Congress : (91° Congress : 1969). Congressional Pictorial Directory: January 1969. Washington, EUA: Government Printing Office, 1969.
Cita MLA (9a ed.)
EUA. United States Congress : (91° Congress : 1969). Congressional Pictorial Directory: January 1969. Government Printing Office, 1969.
Precaución: Estas citas no son 100% exactas.