To cite package ‘photon’ in publications use:

  Lieth J (2024). _photon: High-Performance Geocoding using 'photon'_.
  R package version 0.3.1.9000, , <https://github.com/jslth/photon>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {photon: High-Performance Geocoding using 'photon'},
    author = {Jonas Lieth},
    year = {2024},
    note = {R package version 0.3.1.9000, },
    url = {https://github.com/jslth/photon},
  }