Moche, Dinah L., author
John Wiley & Sons, 1981
Buku Teks
Shaffer, Rick, author
Lowell House, 1999
Buku Referensi
Craghan, Michael, author
John Wiley & Sons, 2003
Buku Teks
Kuhn, Karl F., author
John Wiley & Sons, 1979
Buku Teks
Warhus, Susan, author
McGraw-Hill, 2007
Buku Teks