http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Hướng dẫn học HEADWAY Pre-Intermediate
Quyển sách hướng dẫn học tiếng Anh theo chương trình Headway gồm ngữ pháp, từ vựng, các bài luyện tập theo chủ đề
John, Liz Soars; Nguyễn Thanh Yến, Nguyễn Trung Tánh, Lê Huy Lâm (Dịch và chú giải)