Larson, R. E. (1989). Algebra and Trigonometry (2nd ed.). D.C. Heath and Co..
Tohutoru Kātū Chicago (17th ed.)Larson, Roland E. Algebra and Trigonometry. 2nd ed. Lexington: D.C. Heath and Co., 1989.
Tohutoro MLA (9th ed.)Larson, Roland E. Algebra and Trigonometry. 2nd ed. D.C. Heath and Co., 1989.
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