Lial, M. L. (2005). Trigonometry. New York: Pearson Education, Inc.
Trích dẫn kiểu ChicagoLial, Margaret L. Trigonometry. New York: Pearson Education, Inc, 2005.
MLA CitationLial, Margaret L. Trigonometry. New York: Pearson Education, Inc, 2005.
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