Cerepak, John R., author
Prentice-Hall, 1987
Buku Teks
Clift, R.C., author
Prentice-Hall, 1989
Buku Teks
Edey, Harold C., author
Hutchinson's University Library , 1973
Buku Teks
Fess, Philip E., author
South-Western Publishing , 1993
Buku Teks
Helmkamp, John G., author
John Wiley & Sons, 1989
Buku Teks