United Nations. (1961). Yearbook of the United Nations 1961. New York: Office of Public Information.
Trích dẫn kiểu ChicagoUnited Nations. Yearbook of the United Nations 1961. New York: Office of Public Information, 1961.
MLA引文United Nations. Yearbook of the United Nations 1961. New York: Office of Public Information, 1961.
警告:這些引文格式不一定是100%准確.