Brown, James J., author
John Wiley & Sons, 1994
Buku Teks
Sandbrook, Claire, author
Sweet & Maxwell , 2011
Buku Teks
Dessem, R. Lawrence, author
Thomson/West, 2011
Buku Teks
Chase, Susan K., author
F.A. Davis , 2004
Buku Teks
Sweet & Maxwell, 2005
Buku Teks