Kahan,Steven. (1978). Have some sums to solve: The complete alphametics books. Universities press.
Chicago-stil citatKahan,Steven. Have Some Sums to Solve: The Complete Alphametics Books. Hyderabad: Universities press, 1978.
MLA-referensKahan,Steven. Have Some Sums to Solve: The Complete Alphametics Books. Universities press, 1978.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.