Arnold, John, author
Prenctice-Hall, 1983
Buku Teks
Cooke, Steve
Prentice-Hall, 1991
Buku Teks
Odiorne, George S., author
Prentice-Hall, 1969
Buku Teks
Arnold, John, author
Prentice-Hall, 1990
Buku Teks
Awad, Elias M., author
Prentice-Hall, 2004
Buku Teks