Neale, J. E.
Penguin Books, 1960
Buku Teks
Neale, J. E.
Alden Press, 1950
Buku Referensi
edited by Richard L. Greaves
D.C. Heath, 1974
Buku Referensi
Waldman, Milton
Houghton Mifflin, 1933
Buku Teks
Collis, Maurice, 1889-1973
Faber and Faber , 1935
Buku Teks