Tham khảo Lạng

  1. 1 2 Hán-Việt từ điển của Thiều Chửu. Nhà Xuất Bản TP. Hồ chí Minh. 2002
  2. ↑ United Nations. Department of Economic and Social Affairs. Statistical Office of the United Nations. World Weights and Measures. Handbook for Statisticians. Statistical Papers. Series M no. 21 Revision 1. (ST/STAT/SER.M/21/rev.1), New York: United Nations, 1966.
  3. ↑ Hong Kong government definitions for Chinese units