White, Curt M., author
Thomson, 2002
Buku Teks
Dumont, Raymond A., author
Little, Brown, 1985
Buku Teks
Chappel, R.T., author
Macdonald and Evans, 1976
Buku Teks
Lientz, Bannet P.
Times Mirror Mosby College Publishing, 1987
Buku Teks
Loomis, Mary E.S., author
Prentice-Hall, 1983
Buku Teks