Mertz, Henriette
Ballantine Books, 1972
Buku Teks
Lamb, Harold, author
Doubleday, 1955
Buku Teks
Bisson, T.A., author
Macmilan Co., 1945
Buku Teks
Grantham, A.E.
Methuen & Co, 1927
Buku Teks
Introd. by Rene Grousset
B.T. Batsford,, 1936
Buku Referensi