http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Common European framework of reference for languages
Phát triển chương trình và thiết kế giáo trình giảng dạy tiếng Anh,Phát triển năng lực giảng dạy tiếng Anh