McGivering, Ian C.
Liverpool University Press, 1960
Buku Teks
edited by Richard Ivan Downing
Weidenfeld and Nicolson, 1973
Buku Teks
Collett, D.
Chapman and Hall, 1991
Buku Teks
Hope, A. D., author
Melbourne University Press, 1963
Buku Teks
Baker, Sidney J.
Currawong Publishing, 1966
Buku Teks