To cite package ‘regioncode’ in publications use:

Hu Y, Ye X, Qiu Q, Sun Y, Wu W (2026). regioncode: Convert Region Names and Division Codes of China Over Years. R package version 0.2.2, https://github.com/sammo3182/regioncode.

Corresponding BibTeX entry:

  @Manual{,
    title = {regioncode: Convert Region Names and Division Codes of
      China Over Years},
    author = {Yue Hu and Xinyi Ye and Qian Qiu and Yufei Sun and
      Wenquan Wu},
    year = {2026},
    note = {R package version 0.2.2},
    url = {https://github.com/sammo3182/regioncode},
  }