Eadie, Donald, author
Prentice-Hall, 1971
Buku Teks
Hoffer, Jeffrey A., author
Addison-Wesley, 1998
Buku Teks
Hoffer, Jeffrey A., author
The Benyamin/cummings pub, 1996
Buku Teks
Cleland, David I., author
McGraw-Hill, 1972
Buku Teks
Hare, Van Court, author
Harcourt, Brace and World, 1967
Buku Teks