Seo, K.K., author
Richard D. Irwin, 1991
Buku Teks
Samuelson, William F., author
Driden Press, 1999
Buku Teks
Mantel, Samuel J., author
Prentice-Hall, 1964
Buku Teks
Hein, Leonard W., author
Prentice Hall of India, 1974
Buku Teks
Radford, K.J., author
Phoenix Press, 1981
Buku Teks