Campbell, Oscar James, author
Crofts, 1947
Buku Teks
Graves, Robert, author
Macmillan, 1943
Buku Referensi
Williams, Harold Herbert, author
Sidgwick & Jackson, 1918
Buku Teks
Renier, G.J., author
William and Norgate, 1932
Buku Teks
Krontiris, Tina, author
Routledge, 1992
Buku Teks