Kiernan, Brian
Currency Press, 1996.
Buku Teks
Kierman, Brian
William Heinemann Australia, 1990
Buku Teks
Pol, E.H.
Leiden Luctor et Emargo 1953
Buku Teks
Carroll, Dennis, author
Macmillan, 1987
Buku Teks
Hendel, Charles W., author
The Bobbs-Merrill, 1963
Buku Teks