Corwin, Charles H., author
Prentice-Hall, 2001
Buku Teks
Jurch, George R., author
Burgess, 1975
Buku Teks
by Horace D. Crockford [and others]
John Wiley & Sons, 1975
Buku Teks
Woods, A.E., author
The Avi Publishing, 1977
Buku Teks
Gail A. Steehler, editor
McGraw-Hill, 2009
Buku Teks