APA

ONU, Naciones Unidas, . (1971). Yearbook of the United Nations. New York: Office of Public Information, United Nations.

Chicago

ONU, Naciones Unidas, . 1971. Yearbook of the United Nations. New York: Office of Public Information, United Nations.

Harvard

ONU, Naciones Unidas, . (1971). Yearbook of the United Nations. New York: Office of Public Information, United Nations.

MLA

ONU, Naciones Unidas, . Yearbook of the United Nations. New York: Office of Public Information, United Nations. 1971.