Cita APA (7th ed.)

Freeman, H. (1962). Finite differences for actuarial students (2nd ed.). University Press.

Cita Chicago (17th ed.)

Freeman, Harry. Finite Differences for Actuarial Students. 2nd ed. Cambridge: University Press, 1962.

Cita MLA (9th ed.)

Freeman, Harry. Finite Differences for Actuarial Students. 2nd ed. University Press, 1962.