Beckenbach, E. F., & Drooyan, I. (1977). Modern college algebra and trigonometry (3d ed.). Wadsworth Pub. Co..
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Chicago-čujuhus (17. p.)
Beckenbach, Edwin F., juo Irving Drooyan. Modern College Algebra and Trigonometry. 3d ed. Belmont, Calif.: Wadsworth Pub. Co., 1977.
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MLA-čujuhus (9. p.)
Beckenbach, Edwin F., juo Irving Drooyan. Modern College Algebra and Trigonometry. 3d ed. Wadsworth Pub. Co., 1977.
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