Drummond, Michael F.
Oxford Univesity Press, 1980
Buku Teks
Drummond, Michael F.
Oxford University Press, 1981
Buku Teks
Garrett, Thomas M.
Prentice-Hall, 2001
Buku Teks
Goldsmith, Seth B.
Jones & Bartlett, 2011
Buku Teks
An Aspen Publication, 1995
Buku Teks