Neeley, L. Paden, author
South-Western Publishing, 1991
Buku Teks
Arnold, John, author
Prentice-Hall, 1990
Buku Teks
Dearden, John, 1919-2004, author
Prentice-Hall, 1988
Buku Teks
Sizer, John
Penguin books, 1989
Buku Teks
Hansen, Don R., author
Erlangga, 1999
Buku Teks