Mumford, David
Springer-Verlag, 1994
Buku Teks
Phelps, D. Maynard
Richard D. Irwin. Inc., 1968
Buku Teks
Fisher, Bruce D, author
West Publishing Company, 1986
Buku Teks
Pansini, Anthony J., author
The Fairmont Press, 1994
Buku Teks
Duke University Press , 1988
Buku Teks