http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Hoạt động giáo dục ở trường trung học cơ sở
Giáo trình đào tạo giáo viên THCS hệ cao đẳng sư phạm
Hà Nhật Thăng; Nguyễn Dục Quang, Lê Thanh Sử, Nguyễn Thị Kỷ