APA Citation

Crawford, M., & Crawford, M. (2008). Introduction to number theory (2. edition.). United States of America: AoPS Incorporated.

Chicago Style Citation

Crawford, Mathew, and Mathew Crawford. Introduction to Number Theory. 2. edition. United States of America: AoPS Incorporated, 2008.

MLA Citation

Crawford, Mathew, and Mathew Crawford. Introduction to Number Theory. 2. edition. United States of America: AoPS Incorporated, 2008.

Warning: These citations may not always be 100% accurate.