To cite package ‘geojsonio’ in publications use:

  Chamberlain S, Teucher A, Mahoney M (2024). _geojsonio: Convert Data
  from and to 'GeoJSON' or 'TopoJSON'_. R package version 0.11.3.9000,
  , <https://github.com/ropensci/geojsonio>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {geojsonio: Convert Data from and to 'GeoJSON' or 'TopoJSON'},
    author = {Scott Chamberlain and Andy Teucher and Michael Mahoney},
    year = {2024},
    note = {R package version 0.11.3.9000, 
},
    url = {https://github.com/ropensci/geojsonio},
  }