To cite package ‘finna’ in publications use:

  Jeba A, Lahti L (2025). _finna: Access the 'Finna' API_. R package
  version 0.1.1, <https://CRAN.R-project.org/package=finna>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {finna: Access the 'Finna' API},
    author = {Akewak Jeba and Leo Lahti},
    year = {2025},
    note = {R package version 0.1.1},
    url = {https://CRAN.R-project.org/package=finna},
  }