To cite package ‘data.tree’ in publications use:

  Glur C (2023). _data.tree: General Purpose Hierarchical Data
  Structure_. R package version 1.1.0,
  <https://github.com/gluc/data.tree>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {data.tree: General Purpose Hierarchical Data Structure},
    author = {Christoph Glur},
    year = {2023},
    note = {R package version 1.1.0},
    url = {https://github.com/gluc/data.tree},
  }