Garrett, Thomas M.
Prentice-Hall, 2001
Buku Teks
Drummond, Michael F.
Oxford University Press, 1989
Buku Teks
Drummond, Michael F.
Oxford Univesity Press, 1980
Buku Teks
Niles, Nancy J
Jones and Bartlett , 2011
Buku Teks
Shi, Leiyu
Jones & Bartlett Learning, 2014
Buku Teks