United Nations Educational, Science and Cultural Organization. (1956). UNESCO source book for science teaching. s.n.
Chicago-Zitierstil (17. Ausg.)United Nations Educational, Science and Cultural Organization. UNESCO Source Book for Science Teaching. [Paris: s.n, 1956.
MLA-Zitierstil (9. Ausg.)United Nations Educational, Science and Cultural Organization. UNESCO Source Book for Science Teaching. s.n, 1956.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.