http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Hướng dẫn luyện thi tiếng Anh theo chương trình TOEIC để đạt được điểm 520
Neungule Education; Nguyễn Thành Yến chuyển ngữ phần chú giải