http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Lịch sử văn học Việt Nam; Biên soạn: Liên tổ văn học Việt Nam; Hiệu đính: Bùi Văn Nguyên
folk literature, vietnamese - study and teaching