Hacker, Louis M., author
Columbia University Press, 1947.
Buku Teks
Duxbury, Neil, author
Clarendon Press, 1995
Buku Teks
Epps, Garrett, author
Oxford Univesity Press, 2013
Buku Teks
Bardes, Barbara A., author
Thomson/Wadsworth, 2006
Buku Teks
Ferguson, John H., author
McGraw-Hill, 1947
Buku Teks