Não informado. (1959). Science Education News. American Association for the Advancement of Science.
Chicago-referens (17:e uppl.)Não informado. Science Education News. Washington: American Association for the Advancement of Science, 1959.
MLA-referens (8:e uppl.)Não informado. Science Education News. American Association for the Advancement of Science, 1959.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.