(2005). Thinkwell's precalculus. [Austin, Tex.]: Thinkwell.
Trích dẫn kiểu ChicagoThinkwell's Precalculus. [Austin, Tex.]: Thinkwell, 2005.
MLA citiranjeThinkwell's Precalculus. [Austin, Tex.]: Thinkwell, 2005.
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