Cita APA (7a ed.)

Barnes, W., & Morgan, J. H. (1961). The Foreign Service of the United States: Origins, development and functions. Historical Office, Bureau of Public Affairs, Dept. of State.

Cita Chicago Style (17a ed.)

Barnes, William, y John Heath Morgan. The Foreign Service of the United States: Origins, Development and Functions. [Washington: Historical Office, Bureau of Public Affairs, Dept. of State, 1961.

Cita MLA (8a ed.)

Barnes, William, y John Heath Morgan. The Foreign Service of the United States: Origins, Development and Functions. Historical Office, Bureau of Public Affairs, Dept. of State, 1961.