Cita APA (7th ed.)

Long, C. T. (1965). Elementary introduction to number theory. D. C. Heath and Company.

Cita Chicago (17th ed.)

Long, Calvin T. Elementary Introduction to Number Theory. Boston: D. C. Heath and Company, 1965.

Cita MLA (9th ed.)

Long, Calvin T. Elementary Introduction to Number Theory. D. C. Heath and Company, 1965.