http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Niên giám các điều ước quốc tế nước Cộng hòa xã hội chủ nghĩa Việt Nam ký năm 1992
Nguyễn Bá Sơn, Nguyễn Duy Chiến, Bành Yên Thế (biên soạn)