Loux, Michael J., author
Routledge, 2002
Buku Teks
Miller, Alexander, author
Polity, 2017
Buku Teks
McEachern, William A., author
South-Western College Publishing, 2000
Buku Teks
Gensler, Harry J., 1945-, author
Routledge, 1998
Buku Teks
edited by William O`Grady and Michael Dobrovolsky; U.S. edition Prepared by Mark Aronoff
St. Martin's Press, 1997
Buku Teks