Geyl, Pieter, 1887-1966, author
The World Publishing, 1971
Buku Teks SO
Bell, Andy
Routledge, 2002
Buku Teks
Tarling, Nicholas, author
New Zealand Asia Institute , 2000
Buku Teks
Shteppa, Konstantin F., author
Rutgers University Press, 1962
Buku Teks
Floud, Roderick
Princeton University Press, 1973
Buku Teks