Ferguson, Charles D.
Oxford Univesity Press, 2011
Buku Teks
Collins, Harry
Cambridge University Press , 1993
Buku Teks
Hirsch, Eric Donald, Jr.
Sidney Schwartz, 1988
Buku Teks
Heany, Donald F.
Ronald Press, 1968
Buku Teks
Hirsch, Eric Donald, Jr.
Schwartz Publishing, 1988
Buku Teks