Dyfyniad APA

Cohen, D. (1994). Precalculus with unit-circle trigonometry (2nd ed.). West Publishing Company.

Dyfyniad Arddull Chicago

Cohen, David. Precalculus with Unit-circle Trigonometry. 2nd ed. Minneapolis, NY: West Publishing Company, 1994.

Dyfyniad MLA

Cohen, David. Precalculus with Unit-circle Trigonometry. 2nd ed. West Publishing Company, 1994.

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