Barker, J. Craig, author
Routledge, 2016
Buku Teks
Her Majesty's Stationery Office, 1989
Buku Referensi
Her Majesty's Stationery Office, 1990
Buku Referensi
Her Majesty's Stationery Office, 1995
Buku Referensi
Satow, Ernest Mason, 1843-1929, author
Longmans, Green, 1958
Buku Teks