To cite oldr in publications use:

  Mark Myatt, Ernest Guevarra, Pascale Fritsch, Katja Siling (2025).
  _oldr: An Implementation of Rapid Assessment Method for Older
  People_. doi:10.5281/zenodo.7505731
  <https://doi.org/10.5281/zenodo.7505731>, R package version 0.2.3,
  <https://rapidsurveys.io/oldr/>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {oldr: An Implementation of Rapid Assessment Method for Older People},
    author = {{Mark Myatt} and {Ernest Guevarra} and {Pascale Fritsch} and {Katja Siling}},
    year = {2025},
    note = {R package version 0.2.3},
    url = {https://rapidsurveys.io/oldr/},
    doi = {10.5281/zenodo.7505731},
  }