Hill, L.A.
Oxford University Press, 1982
Buku Teks
Spiro, Socrates, bey, 1868-, compiler
Elias Modern Press, 1929
Buku Referensi
Morgan, John, 1944-2004, author
Oxford University Press, 1990
Buku Teks
Hava, J.G., author
Catholic Press , 1951
Buku Referensi
Artikel Jurnal