Betty, John Galtress, 1922-, author
McGraw-Hill, 1993
Buku Teks
Waters, Donald, author
Addison-Wesley, 1998
Buku Teks
Fulmer, Robert M., author
Richard D. Irwin , 1983
Buku Teks
Hogan, Rex, 1944-, author
Prentice-Hall, 1990
Buku Teks
Lasher, William R., author
Western College Publishing , 2000
Buku Teks