Cita APA

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

Citación estilo Chicago

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

Cita MLA

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