APA-viite

Kahan,Steven. (1978). Have some sums to solve: The complete alphametics books. Universities press.

Chicago-tyylinen lähdeviittaus

Kahan,Steven. Have Some Sums to Solve: The Complete Alphametics Books. Hyderabad: Universities press, 1978.

MLA-viite

Kahan,Steven. Have Some Sums to Solve: The Complete Alphametics Books. Universities press, 1978.