To cite package ‘valuemap’ in publications use:

Ha H (2022). valuemap: Making Choropleth Map. R package version 2.0.4, https://github.com/curycu/valuemap.

Corresponding BibTeX entry:

  @Manual{,
    title = {valuemap: Making Choropleth Map},
    author = {Huncheol Ha},
    year = {2022},
    note = {R package version 2.0.4},
    url = {https://github.com/curycu/valuemap},
  }