Não informado. (1905). School science and mathematics. School Science and Mathematics Association.
Chicago-referens (17:e uppl.)Não informado. School Science and Mathematics. Menasha, Wis: School Science and Mathematics Association, 1905.
MLA-referens (8:e uppl.)Não informado. School Science and Mathematics. School Science and Mathematics Association, 1905.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.