http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
English grammả in use: (136 đề mục ngữ pháp tiếng Anh)
Nhà xuất bản Thành phố Hồ Chí Minh
Raymond Murphy ; Võ Trọng Thuỷ ( dịch )