Dyfyniad APA
Hellman, G. (1989). Mathematics without numbers: Towards a modal-structural interpretation. Clarendon Press ; Oxford University Press.
Dyfyniad Arddull Chicago
Hellman, Geoffrey. Mathematics Without Numbers: Towards a Modal-structural Interpretation. Oxford : New York: Clarendon Press ; Oxford University Press, 1989.
Dyfyniad MLA
Hellman, Geoffrey. Mathematics Without Numbers: Towards a Modal-structural Interpretation. Clarendon Press ; Oxford University Press, 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.