Rodgers, William H.
[Publisher not identified], 1977
Buku Teks
West Publishing Company, 1996
Buku Teks
Tabb, William Murray
Michie, 1992
Buku Teks
Little,Brown and Company, [date of publication not identified]
Buku Teks
Bonine, John E.
[Publisher not identified], 1992
Buku Teks