Dyfyniad APA
Cohen, D. (1987). Precalculus: A problems - Oriented approach (2nd ed.). West Publishing Co..
Dyfyniad Arddull Chicago
Cohen, David. Precalculus: A Problems - Oriented Approach. 2nd ed. St Paul: West Publishing Co., 1987.
Dyfyniad MLA
Cohen, David. Precalculus: A Problems - Oriented Approach. 2nd ed. West Publishing Co., 1987.
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