Nanney, J. Louis
Trigonometry : a skills approach, lecture version
Allyn and Bacon, 1980
Buku Teks SO
Nanney, J. Louis
Algebra and trigonometry: a skills approach
Allyn and Bacon, 1980
Buku Teks SO
Kuechle, Richard T.
Trigonometry : a New approach
Wadsworth, 1984
Buku Teks SO
Dwyer, David
College algebra and trigonometry : a contemporary approach
Brooks/Cole, 2000
Buku Teks SO
Cohen, David
Precalculus : a problems-oriented approach : interactive video skillbuilder CD
Thomson, 2006
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