Goldman, Stephen H., author
Houghton Miffiln, 1986
Buku Teks
Cambridge University Press, 2007
eBooks
Miller, George
Prentice-Hall, 1986
Buku Teks
Spaventa, Lou J., author
McGraw-Hill, 2001
Buku Teks
Trimmer, Joseph F., author
Houghton Miffiln, 1981
Buku Teks