http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
IELTS listening strategies for the ielts test
Tổng hợp Tp. Hồ Chí Minh: Nhân Trí Việt
Vương Ngọc Tây, Lý Á Tân, Lê Huy Lâm (chuyển ngữ phần chú giải)