Keck, Robert W
Addison Wesley Longman , 2000
Buku Teks
Speidel, Richard E., author
St. Paul, Minn, 1993
Buku Teks
Stockton, John M., author
West Publishing, 1992
Buku Teks
Barry, John W., author
McGraw-Hill, 1981
Buku Teks
Stanton, William J., author
Richard D. Irwin, 1978
Buku Teks