Walstad, William B., author
McGraw-Hill, 2002
Buku Teks
Cavanaugh, Joseph M., author
Burgess, 1975
Buku Teks
Cavanaugh, Joseph M., author
Burgess, 1976
Buku Teks
Morrison, Robert Thornton, author
Prentice-Hall, 1992
Buku Teks
Brady, James E., author
John Wiley & Sons, 1981
Buku Teks