To cite package ‘haahka’ in publications use:

  Lehtomaki J, Morris W (2024). _haahka: Haahka bird migration
  browser_. R package version 0.7.19.9000,
  <https://github.com/luomus/haahka>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {haahka: Haahka bird migration browser},
    author = {Joona Lehtomaki and William K. Morris},
    year = {2024},
    note = {R package version 0.7.19.9000},
    url = {https://github.com/luomus/haahka},
  }