http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
IELTS preparation and practice : reading and writing : Academic module
Wendy Sahanaya, Jeremy Lindeck, Richard Stewart ; Chú giải: Vũ Tài Hoa, Nguyễn Văn Phước, Ban biên dịch First News.