Blakeney, E.H.
J.M. Dent & Sons, 1952
Buku Referensi
Arnold-Baker, C.
J.M. Dent & Sons, 1954
Buku Teks
Schwartz, Robert J.
Crowell , 1955
Buku Referensi
Jones, David J.
Australia, Second Back Row Press
Buku Referensi
Oxford University Press, 1996
Buku Referensi