Kubba, Sam
McGraw-Hill, 2003
Buku Teks SO
McGowan, Maryrose
John Wiley & Sons, [Date of publication not identified]
Buku Teks SO
Piotrowski, Christine M.
Wiley, 1999
Buku Teks SO
Bonda, Penny
Wiley, 2007
Buku Teks SO
Foster, Kari
John Wiley & Sons, 2007
Buku Teks SO