http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
a new self-study reference and practice book for learners of English : with answers
Fully new updated edition with audio cassettes - CD.
Raymond Murphy, William R. Smalzer ; Chú giải: Trần Thế Vinh, Nguyễn Văn Phước, ban biên dịch First News.