Não informado. (1963). Science and children. National Science Teachers Association.
Chicago-referens (17:e uppl.)Não informado. Science and Children. Washington: National Science Teachers Association, 1963.
MLA-referens (8:e uppl.)Não informado. Science and Children. National Science Teachers Association, 1963.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.