Oxford University press , 1994
Buku Teks
edited by Leonie Kramer
Oxford University Press, 1981
Buku Teks
Oxford Univesity Press, 1994
Buku Referensi
Wilde, William H., author
Oxford University Press, 1994
Buku Referensi
Johson, Bruce, author
Oxford University Press, 1987
Buku Teks