Não informado. (1969). Journal of Undergraduate Mathematics. Guilford College, Department of Mathematics.
Chicago-referens (17:e uppl.)Não informado. Journal of Undergraduate Mathematics. Greensboro, NC: Guilford College, Department of Mathematics, 1969.
MLA-referens (8:e uppl.)Não informado. Journal of Undergraduate Mathematics. Guilford College, Department of Mathematics, 1969.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.