APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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