Minstry Foreign Affairs, [date of publication not identified]
Buku Teks
Leifer, Michael, author
Frederick A. Praeger, 1967
Buku Teks
Wu, Yuan-Li, author
Hoover Institution Press, Stanford University, 1975
Buku Teks
Journal of Population Vol. 6 No. 1,2 2000 : 37-58, 2000
Artikel Jurnal
Treat, Payson J., author
Peter Smith, 1963
Buku Teks