Bitter, Gary G., author
Allyn and Bacon, 1989
Buku Teks
Farris, Pamela J., author
New York, 2001
Buku Teks
Devine, Donald F., author
John Wiley & Sons, 1983
Buku Teks
Beckmann, Sybilla, author
Pearson Addison Wesley, 2008
Buku Teks
Long, Calvin T., author
Pearson - Addison Wesley, 2009
Buku Teks