Roek, Jan de, author
Pink Editions & Productions, 1980
Buku Teks
Tarling, Nicholas, author
New Zealand Asia Institute, 2005
Buku Teks
Hawley, Amos H., author
The University of Chicago Press, 1986
Buku Teks
Mill, John Stuart
A Meridian Book, 1962
Buku Teks
Robinson, Joan, author
Macmillan, 1947
Buku Teks