Montgomery, B.
The Word Publishing Comp, [date of publication not identified]
Buku Teks
Giramondo, 2000
Buku Teks
Offices of the Royal Historical society, 1963
Buku Referensi
Faculty of engineering saitama university,
Majalah, Jurnal, Buletin
Kennan, George F., 1904-
Little, Brown, 1967
Buku Teks