http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
New Interchange is a multi-level series for adult and young-adult learners of English from the beginning to the high-intermediate level.
Jack C. Richards, Jonathan Hull, Susan Procter
Textbooks for foreign speakers,Sách giáo khoa cho người nói nước ngoài