http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
tập bài giảng kĩ thuật soạn thảo văn bản quản lí hành chính nhà nước
Nguyễn Văn Chức; Hà, Thị Yến Lương