APA-viite (7. p.)
Hellman, G. (1989). Mathematics without numbers: Towards a modal-structural interpretation. Clarendon Press ; Oxford University Press.
Chicago-viite (17. p.)
Hellman, Geoffrey. Mathematics Without Numbers: Towards a Modal-structural Interpretation. Oxford : New York: Clarendon Press ; Oxford University Press, 1989.
MLA-viite (9. p.)
Hellman, Geoffrey. Mathematics Without Numbers: Towards a Modal-structural Interpretation. Clarendon Press ; Oxford University Press, 1989.
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