Nowak, John E., author
Thomson/West, 2010
Buku Teks
Scheb, John M., author
Thomson Wadworth, 2005
Buku Teks
Breyer, Stephen G., 1938-, author
Little, Brown, 1982
Buku Teks
Leyland, Peter
Blackstone Press limited, 1999
Buku Teks
Schwartz, Bernard, author
Little, Brown & Co., 1977
Buku Teks