U.S. Dept. of State. (1948). Department of foreign service series 1-. s.n.
Chicago Style aipamenaU.S. Dept. of State. Department of Foreign Service Series 1-. S.l: s.n, 1948.
MLA aipamenaU.S. Dept. of State. Department of Foreign Service Series 1-. s.n, 1948.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.