Kahan,Steven. (1978). Have some sums to solve: The complete alphametics books. Universities press.
استشهاد بنمط شيكاغوKahan,Steven. Have Some Sums to Solve: The Complete Alphametics Books. Hyderabad: Universities press, 1978.
MLA استشهادKahan,Steven. Have Some Sums to Solve: The Complete Alphametics Books. Universities press, 1978.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.