Barnett, Raymond A., author
McGraw-Hill, 2000
Buku Teks
Hungerford, Thomas W., author
Thomson Brooks/Cole, 2005
Buku Teks
Toskey, Burnett R., author
Addison-Wesly, 1962
Buku Teks
Sobel, Max A., author
Prentice-Hall, 1980
Buku Teks
Barnett, Raymond A., author
McGraw-Hill, 1984
Buku Teks