To cite package ‘caRtociudad’ in publications use:

  Gil Bellosta C, Frías L (2022). _caRtociudad: Interface to
  Cartociudad API_. R package version 0.6.3,
  <https://github.com/ropenspain/cartociudad>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {caRtociudad: Interface to Cartociudad API},
    author = {Carlos J. {Gil Bellosta} and Luz Frías},
    year = {2022},
    note = {R package version 0.6.3},
    url = {https://github.com/ropenspain/cartociudad},
  }