Não informado. (1974). Studies in science education. University of Leeds, Center for Studies in Science Education.
Chicago-referens (17:e uppl.)Não informado. Studies in Science Education. Leeds, Inglaterra: University of Leeds, Center for Studies in Science Education, 1974.
MLA-referens (8:e uppl.)Não informado. Studies in Science Education. University of Leeds, Center for Studies in Science Education, 1974.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.