http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Trường Đại học Ngôn ngữ Bắc Kinh
Dùng kèm 6 Audion CDs; Gồm 32 bài. một chương có ba bài, sau mỗi chương bổ sung phần bài tập chương. Bài tập chương chia thành hai phần chính là nghe và nói