http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Triệu Khắc Lễ, Trần Tuấn, Khắc Tiến
ĐBS: Bộ giáo dục và đào tạo, dự án đào tạo giáo viên THCS