Não informado. (1974). Studies in science education. University of Leeds, Center for Studies in Science Education.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Studies in Science Education. Leeds, Inglaterra: University of Leeds, Center for Studies in Science Education, 1974.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Studies in Science Education. University of Leeds, Center for Studies in Science Education, 1974.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.