Citazione Stile APA (7a Edizione)

Freeman, H. (1962). Finite differences for acturial students (2nd.). Univ. Press.

Citazione stile Chigago Style (17a edizione)

Freeman, Harry. Finite Differences for Acturial Students. 2nd. Cambridge: Univ. Press, 1962.

Citatione MLA (9a ed.)

Freeman, Harry. Finite Differences for Acturial Students. 2nd. Univ. Press, 1962.