Lindsay, A.D., author
Oxford University Press, 1959
Buku Teks
Iver, R.M. Mac, author
Aksara Baru, 1980
Buku Teks
Seckler-Hudson, Catheryn, author
United State Information Service, 1959
Buku Teks
Select Publishing, 2001
Buku Teks
Macmillan, 1995
Buku Teks