Waller, Robert James, author
Warner Books, 1992
Buku Teks
Brant, Irving
Bobbs-Merrill Company,Inc., 1953
Buku Teks
Graham, Bruce Desmond, author
Australian National University Press, 1966
Buku Teks
Norden, Mary, author
Conran Octopus Limited, 2000
Buku Referensi
Tulloch, Mitch, author
Currency Press, 1986
Buku Teks