Link, Arthur S., author
University of Pennsylvania Press , 1957
Buku Teks
Wilson, Jennie, author
Bailliere Tindall, 2003
Buku Teks
Vinacke, Harold M., author
Indiana University Press, 1957
Buku Teks
Pan Books , 1972
Buku Teks
Wilson, Dick, author
Penguin Books, 1972
Buku Teks