http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Định kiểu Web với CSS : tài liệu hướng dẫn người thiết kế
Charles Wyke-Smith; Trường Đại học FPT (dịch)
CSS (Cascading Style Sheets); Thiết kế web