United Nations Educational, Scientist and Cultural Organization. (1973). New UNESCO source book for science teaching. United Nations Educational Scientific and Cultural Organization.
Cytowanie według stylu Chicago (wyd. 17)United Nations Educational, Scientist and Cultural Organization. New UNESCO Source Book for Science Teaching. Paris: United Nations Educational Scientific and Cultural Organization, 1973.
Cytowanie według stylu MLA (wyd. 9)United Nations Educational, Scientist and Cultural Organization. New UNESCO Source Book for Science Teaching. United Nations Educational Scientific and Cultural Organization, 1973.
Uwaga: Te cytaty mogą odróżniać się od wytycznej twojego fakultetu..