To cite package ‘dendroextras’ in publications use:

  Jefferis G (2026). _dendroextras: Extra Functions to Cut, Label and
  Colour Dendrogram Clusters_. R package version 0.2.4,
  <https://github.com/jefferis/dendroextras>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {dendroextras: Extra Functions to Cut, Label and Colour Dendrogram Clusters},
    author = {Gregory Jefferis},
    year = {2026},
    note = {R package version 0.2.4},
    url = {https://github.com/jefferis/dendroextras},
  }
