To cite package ‘ageutils’ in publications use:

  Taylor T, van Leeuwen E (2024). _ageutils: Collection of Functions
  for Working with Age Intervals_. R package version 0.0.7,
  <https://CRAN.R-project.org/package=ageutils>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ageutils: Collection of Functions for Working with Age Intervals},
    author = {Tim Taylor and Edwin {van Leeuwen}},
    year = {2024},
    note = {R package version 0.0.7},
    url = {https://CRAN.R-project.org/package=ageutils},
  }