To cite package ‘fueleconomy’ in publications use:

Wickham H (2020). fueleconomy: EPA Fuel Economy Data. R package version 1.0.0.9000, https://github.com/hadley/fueleconomy.

Corresponding BibTeX entry:

  @Manual{,
    title = {fueleconomy: EPA Fuel Economy Data},
    author = {Hadley Wickham},
    year = {2020},
    note = {R package version 1.0.0.9000},
    url = {https://github.com/hadley/fueleconomy},
  }