To cite package ‘shinyslack’ in publications use:

  Harmon J (2024). _shinyslack: Integrate Slack and Shiny_. R package
  version 0.0.0.9010, <https://github.com/r4ds/shinyslack>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {shinyslack: Integrate Slack and Shiny},
    author = {Jon Harmon},
    year = {2024},
    note = {R package version 0.0.0.9010},
    url = {https://github.com/r4ds/shinyslack},
  }