To cite package ‘fueleconomy’ in publications use:

  Wickham H (2024). _fueleconomy: EPA Fuel Economy Data_. R package
  version 1.0.0.9000, <https://github.com/hadley/fueleconomy>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fueleconomy: EPA Fuel Economy Data},
    author = {Hadley Wickham},
    year = {2024},
    note = {R package version 1.0.0.9000},
    url = {https://github.com/hadley/fueleconomy},
  }