Freeman, H. (1965). Finite differences for acturial students (2nd.). Univ. Press.
Čikaški stil citiranja (17. izdanje)Freeman, Harry. Finite Differences for Acturial Students. 2nd. Cambridge: Univ. Press, 1965.
MLA način citiranja (9. izdanje)Freeman, Harry. Finite Differences for Acturial Students. 2nd. Univ. Press, 1965.
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