Jeffares, A. Norman
Stanford University Press, 1968
Buku Teks
Cambridge University Press, 1996
eBooks
Leeming, Glenda, author
Macmillan, 1989
Buku Teks
Marcus, Phillip L.
Macmillan, 1992
Buku Teks
Ussher, Arland
The New American Library, 1957
Buku Teks