To cite package ‘R6’ in publications use:

  Chang W (2024). _R6: Encapsulated Classes with Reference Semantics_.
  R package version 2.5.1.9000, , <https://github.com/r-lib/r6>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {R6: Encapsulated Classes with Reference Semantics},
    author = {Winston Chang},
    year = {2024},
    note = {R package version 2.5.1.9000, },
    url = {https://github.com/r-lib/r6},
  }