Cita APA (7a ed.)

Freeman, M. B., & Freeman, I. M. (1946). Fun with figures. Random House.

Cita Chicago Style (17a ed.)

Freeman, Mae Blacker, y Ira M. Freeman. Fun with Figures. New York: Random House, 1946.

Cita MLA (9a ed.)

Freeman, Mae Blacker, y Ira M. Freeman. Fun with Figures. Random House, 1946.