U.S. Dept. of State. (1948). Department of foreign service series 1-. s.n.
Cita Chicago (17th ed.)U.S. Dept. of State. Department of Foreign Service Series 1-. S.l: s.n, 1948.
Cita MLA (9th ed.)U.S. Dept. of State. Department of Foreign Service Series 1-. s.n, 1948.
Atenció: Aquestes cites poden no estar 100% correctes.