Christopher, James W., author
E.J. Brill, 1928
Buku Teks
Lower, Arthur R.M., author
The Haddon Craftsmen, 1941
Buku Teks
Latourette, Kenneth Scott, author
Macmillan, 1951
Buku Teks
Dallin, David
Hollis & Carter, 1949
Buku Teks
Europe Publications Limited, 1992
Buku Referensi