Banks, J. A. (2002). Student guide for Stewart/Redlin/Watson's precalculus: Mathematics for calculus (Fourth edition.). Brooks/Cole.
Chicago-viite (17. p.)Banks, John A. Student Guide for Stewart/Redlin/Watson's Precalculus: Mathematics for Calculus. Fourth edition. Australia: Brooks/Cole, 2002.
MLA-viite (9. p.)Banks, John A. Student Guide for Stewart/Redlin/Watson's Precalculus: Mathematics for Calculus. Fourth edition. Brooks/Cole, 2002.
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