@book{han-nom-d8-rd8a-p006,
  title = {Lưu Văn An công sách lược 劉文安公策略},
  author = {Liu, Dingzhi and Lưu, Đình Côn},
  url = {https://www.viet-dien.com/t/han-nom-d8-rd8a-p006/2},
  pages = {2},
  note = {held by Columbia University Libraries},
  urldate = {2026-09-06},
}