(1900). The science of numbers simplified: A book of practical short rules in mathematics. New York: J. L. O'Connor.
استشهاد بنمط شيكاغوThe Science of Numbers Simplified: A Book of Practical Short Rules in Mathematics. New York: J. L. O'Connor, 1900.
MLA استشهادThe Science of Numbers Simplified: A Book of Practical Short Rules in Mathematics. New York: J. L. O'Connor, 1900.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.