Samuel, Myra L., author
Pearson - Prentice Hall, 2003
Buku Teks
Schork, M. Anthony, author
Prentice-Hall, 2000
Buku Teks
Dawson-Saunders, Beth, author
Conn Appleton & Lange, 1990
Buku Teks
Daniel. Wayne W., author
John Wiley & Sons, 1999
Buku Referensi
Daniel, Wayne W., author
John Wiley & Sons, 1983
Buku Teks