Speaight, R.
Arthur Barker, 1954
Buku Teks SO
Laski, Marghanita
Thames & Hudson, 1973
Buku Teks
edited by Gordon S. Haight
Methuen, 1966
Buku Teks
Henry, Nancy
Cambridge University Press, 2008
eBooks
Eliot, Thomas Stearns
New York Tinehart 1948
Buku Teks