Swokowski, Earl W.
Functions and graphs
Prindle, Weber & Schmidt, 1984
 Buku Teks SO
Kuechle, Richard T.
Trigonometry : a New approach
Wadsworth, 1984
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Rice, Bernard J.
Plane trigonometry
Prindle, Weber & Schmidt, 1975
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Pignani, Tullio J.
Elements of trigonometry
Harcourt, Brace, and World, 1968
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Cameron, Edward A.
Brief trigonometry
Reynal & Hitchock, 1941
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