To cite package ‘recommenderlabJester’ in publications use:

  Hahsler M (2022). _recommenderlabJester: Jester Dataset for
  'recommenderlab'_. R package version 0.2-0,
  <https://github.com/mhahsler/recommenderlabjester>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {recommenderlabJester: Jester Dataset for 'recommenderlab'},
    author = {Michael Hahsler},
    year = {2022},
    note = {R package version 0.2-0},
    url = {https://github.com/mhahsler/recommenderlabjester},
  }