http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Sổ tay thiết kế công nghệ chế tạo máy:T.2
Đại học và trung học chuyên nghiệp
Nguyễn Văn Lẫm, Nguyễn Trọng Hiệp