To cite package ‘umweltapir’ in publications use:

  Vogel J, Berthold M (2026). _umweltapir: Access Umwelt.Info API_. R
  package version 0.1.0,
  <https://CRAN.R-project.org/package=umweltapir>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {umweltapir: Access Umwelt.Info API},
    author = {Johannes Vogel and Maximilian Berthold},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=umweltapir},
  }