To cite package ‘leaflet’ in publications use:

  Cheng J, Schloerke B, Karambelkar B, Xie Y (2024). _leaflet: Create
  Interactive Web Maps with the JavaScript 'Leaflet' Library_. R
  package version 2.2.2.9000, , <https://github.com/rstudio/leaflet>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {leaflet: Create Interactive Web Maps with the JavaScript 'Leaflet'
Library},
    author = {Joe Cheng and Barret Schloerke and Bhaskar Karambelkar and Yihui Xie},
    year = {2024},
    note = {R package version 2.2.2.9000, 
},
    url = {https://github.com/rstudio/leaflet},
  }