editor, Robert E. Egner; penerjemah, Rani Rahmanillah
Sadasiva, 2003
Buku Teks
Makin, Gideon
Routledge, 2000
Buku Teks SO
Dorward, Alan
Britsh Council, 1951
Buku Teks
Dutton, Geoffrey
Thames and Hudson, 1969
Buku Teks
Poynter, J.R.
Melbourne University Press, 1967
Buku Teks SO