Pike, Douglas, 1908-1974
Cambridge University Press, 1970
Buku Teks
Crawford, R.M.
Hutchinson's University Library, 1955
Buku Teks
Crawford, R.M.
Hutchinson University Library, 1952.
Buku Teks
Shaw, Alan George Lewers
Faber and Faber, 1955
Buku Teks
edited by Gordon Greenwood
Angus and Robertson, 1969
Buku Teks