http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Tiếng Anh cơ bản cho sinh viên ngành khoa học tự nhiên: Biên soạn theo chương trình khung của Bộ Giáo dục và Đào tạo ban hành năm 2003
Essential English for students of science