http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Giáo trình ngôn ngữ kí hiệu thực hành
Trần Thị Thiệp, Bùi Thị Anh Phương; Nguyễn Thị Cẩm Hường,Vương Hồng Tâm