Mitchell, F. H., author
Addison-Wesley, 1959
Buku Teks
Kissell, Thomas E.
Prentice Hall International, 1997
Buku Teks
Ryder, John D.
McGraw-Hill, [date of publication not identified]
Buku Teks
Watson, John, author
Macmillan, 1990
Buku Teks
Bureau of Naval Personnel
Coles, 1980
Buku Teks