Analysis of information sources in references of the Wikipedia article "Đông Á" in Vietnamese language version.
the countries and regions of Mainland China, Hong Kong, Macau, Taiwan, Mongolia, South Korea, North Korea and Japan.
{{Chú thích tạp chí}}: Chú thích magazine cần |magazine= (trợ giúp)the countries and regions of Mainland China, Hong Kong, Macau, Taiwan, Mongolia, South Korea, North Korea and Japan.