Não informado. (1951). School Libraries. American Association of School Librarians.
Chicago-referens (17:e uppl.)Não informado. School Libraries. Fulton, Mo: American Association of School Librarians, 1951.
MLA-referens (8:e uppl.)Não informado. School Libraries. American Association of School Librarians, 1951.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.