Davidson, Melvin, author
Hougtton-Mifflin, 1973
Buku Teks
Schneider, G. Michael, author
John Wiley & Sons, 1982
Buku Teks
Conger, David, author
Pearson, 2002
Buku Teks
Wiener, Richard, author
Addison-Wesley, 1988
Buku Teks
Brown, Gary D., author
John Wiley & Sons, 1977
Buku Teks