United Nations. Advisory Committee for the Co-ordination of Information Systems. (1990). Directory of applications software of the United Nations system. United Nations.
Cytowanie według stylu Chicago (wyd. 17)United Nations. Advisory Committee for the Co-ordination of Information Systems. Directory of Applications Software of the United Nations System. New York: United Nations, 1990.
Cytowanie według stylu MLA (wyd. 9)United Nations. Advisory Committee for the Co-ordination of Information Systems. Directory of Applications Software of the United Nations System. United Nations, 1990.
Uwaga: Te cytaty mogą odróżniać się od wytycznej twojego fakultetu..