Shaw, Alan George Lewers
Longman, Green, 1955
Buku Teks
Allen & Unwin, 1985
Buku Teks
Garnett, A. Camppell (Arthur Camppell)
University of Wisconsin Press , [1949]
Buku Teks
Williams, Morris
Longman, 1972
Buku Teks
Crough, Greg
Penguin Books, 1982
Buku Teks