To cite package ‘twn’ in publications use:

  van Tent J (2026). _twn: Taxa Waterbeheer Nederland voor R_. R
  package version 0.2.7, <https://CRAN.R-project.org/package=twn>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {twn: Taxa Waterbeheer Nederland voor R},
    author = {Johan {van Tent}},
    year = {2026},
    note = {R package version 0.2.7},
    url = {https://CRAN.R-project.org/package=twn},
  }