Gager, William A.
Contemporary college algebra and trigonometry
Macmillan, 1968
Buku Teks
Hackert, Adelbert F.
Elements of trigonometry
D.C. Health, 1971
Buku Teks
Gibilisco, Stan, 1953-
Trigonometry demystified
McGraw-Hill, 2012
Buku Teks
Dwyer, David
College algebra and trigonometry : a contemporary approach
Brooks/Cole, 2000
Buku Teks
Harmon, Frank L.
Modern college trigonometry
Dickenson, 1996
Buku Teks