To cite package ‘gtfsrouter’ in publications use:

  Padgham M, Stepniak M (2024). _gtfsrouter: Routing with 'GTFS'
  (General Transit Feed Specification) Data_. R package version 0.1.3,
  <https://CRAN.R-project.org/package=gtfsrouter>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {gtfsrouter: Routing with 'GTFS' (General Transit Feed Specification) Data},
    author = {Mark Padgham and Marcin Stepniak},
    year = {2024},
    note = {R package version 0.1.3},
    url = {https://CRAN.R-project.org/package=gtfsrouter},
  }