Hamilton, Robert W.
Little, Brown and Company, 1989
Buku Teks
Johnson, Eldred A., author
McGraw-Hill, 1959
Buku Teks
Lavine, A. Lincoln
Prentice-Hall, 1964
Buku Teks
Appleby, Robert C., author
Pitman, 1981
Buku Teks
Iacone, Salvatore J., author
Macmillan, 1985
Buku Teks