To cite package ‘visATC’ in publications use:

  Matthews J (2026). _visATC: Visualise the Anatomical Therapeutic
  Chemical (ATC) Hierarchy_. R package version 1.0.0.9000,
  <https://github.com/jnm212/visatc>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {visATC: Visualise the Anatomical Therapeutic Chemical (ATC) Hierarchy},
    author = {J Matthews},
    year = {2026},
    note = {R package version 1.0.0.9000},
    url = {https://github.com/jnm212/visatc},
  }