To cite package ‘gtfs2gps’ in publications use:

  Pereira R, Andrade P, Bazzo J (2024). _gtfs2gps: Converting Transport
  Data from GTFS Format to GPS-Like Records_. R package version 2.1-2,
  <https://CRAN.R-project.org/package=gtfs2gps>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {gtfs2gps: Converting Transport Data from GTFS Format to GPS-Like Records},
    author = {Rafael H. M. Pereira and Pedro R. Andrade and Joao Bazzo},
    year = {2024},
    note = {R package version 2.1-2},
    url = {https://CRAN.R-project.org/package=gtfs2gps},
  }