Tohutoro APA (7th ed.)
Ross, S. C., & Boyd, L. H. (1991). Precalculus algebra and trigonometry. Brooks/Cole Pub. Co..
Tohutoru Kātū Chicago (17th ed.)
Ross, Sharon Cutler, me Linda Hawkins Boyd. Precalculus Algebra and Trigonometry. Pacific Grove, Calif.: Brooks/Cole Pub. Co., 1991.
Tohutoro MLA (9th ed.)
Ross, Sharon Cutler, me Linda Hawkins Boyd. Precalculus Algebra and Trigonometry. Brooks/Cole Pub. Co., 1991.
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