Mommsen, Theodore
Routledge, 1992
Buku Teks
Boak, Arthur E.R.
Macmillan, 1961
Buku Teks
Boren, Henry C., author
D.C. Heath and Company, 1977
Buku Referensi
Vasiliev, A. A.
University of Wisconsin Press, 1952
Buku Teks
Boren, Henry C.
D.C Heath, 1977
Buku Teks