To cite ARUtools in publications use:

  Hope, David and Steffi LaZerte. ARUtools: a package for ARU data.
  https://github.com/arutools/ARUtools

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ARUtools: a package for ARU data},
    author = {David Hope and Steffi LaZerte},
    year = {2024},
    url = {https://github.com/arutools/ARUtools},
  }