Tucker, Alan, author
John Wiley & Sons, 1980
Buku Teks
Tucher, Alan
John Wiley & Sons, 1984
Buku Teks
Bryant, Victor
Cambridge University Press, 1993
Buku Teks
Penner, R. C.
Princeton University Press, 1992
Buku Teks
Townsend, Michael, author
The Benjamin Cumming, 1987
Buku Teks