To cite package ‘gtfsio’ in publications use:

  Herszenhut D, Poletti F, Padgham M (2024). _gtfsio: Read and Write
  General Transit Feed Specification (GTFS) Files_. R package version
  1.2.0.9000, , <https://github.com/r-transit/gtfsio>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {gtfsio: Read and Write General Transit Feed Specification (GTFS) Files},
    author = {Daniel Herszenhut and Flavio Poletti and Mark Padgham},
    year = {2024},
    note = {R package version 1.2.0.9000, 
},
    url = {https://github.com/r-transit/gtfsio},
  }