Schefer, Krista Nadakavukaren
Edward Elgar Publishing, 2016
Buku Teks
Weatherill, Stephen
Blackstone Press Ltd., 1998
Buku Teks
Foote, Caleb
Little, Brown, 1980
Buku Teks
Tabb, William Murray
Michie, 1992
Buku Teks
Adelman, Martin J.
Thomson/West, 2009
Buku Teks