Cita APA

USA Department of State & Keefer, E. C. (2010). Foreign relations of the United States: 1969/76,7 Vietnam, July 1970 - January 1972. Foreign relations of the United States.

Citación estilo Chicago

USA Department of State y Edward C. Keefer. "Foreign Relations of the United States: 1969/76,7 Vietnam, July 1970 - January 1972." Foreign Relations of the United States 2010.

Cita MLA

USA Department of State y Edward C. Keefer. "Foreign Relations of the United States: 1969/76,7 Vietnam, July 1970 - January 1972." Foreign Relations of the United States, 2010.