King, Victor T., author
Blackwell, 1993
Buku Teks
Yates, Steve, author
Facts On File, 1992
Buku Referensi
Hose, Charles, 1863-1929, author
Oxford University Press, 1993
Buku Teks
Robquain, Charles, author
Longmans, 1958
Buku Teks
Periplus editions, 1992
Buku Teks