Hill, Charles W. L., author
Houghton Mifflin , 1989
Buku Teks
Stanley, David T.
Brookings Institution , 1972
Buku Teks
Aram, John D.
Pitman Pub. , 1986
Buku Teks
Waterland, Liz
The Thimble Press, 1995
Buku Teks
edited by Rachel Brown-Chidsey
Guildford Press, 2005
Buku Teks