Seeley, Christopher
University of Hawaii Press, 2000
Buku Teks
Bruington, Pat
Charles E. Merrill, 1984
Buku Teks
Bramer, George R.
Charles E. Merrill Publishing Company, 1981
Buku Teks
McCrimmon, James W.
Houghton Mifflin, 1984
Buku Teks
Messenger, William E.
Prentice-Hall, 1989
Buku Teks