Bruce, R. Robert, author
Hodder & Stoughton, 1994
Buku Teks
Schweber, William, author
Prentice-Hall, 1996
Buku Teks
Coultas, Barbara, author
Teach Yourself Books, 1990
Buku Teks
McArthur, Tom (Thomas Burns), author
Cambridge University Press, 1983
Buku Teks
Martin, Samuel E.
Tuttle Company, 1956
Buku Teks