To cite package ‘htmltools’ in publications use:

  Cheng J, Sievert C, Schloerke B, Chang W, Xie Y, Allen J (2024).
  _htmltools: Tools for HTML_. R package version 0.5.8.9000, ,
  <https://github.com/rstudio/htmltools>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {htmltools: Tools for HTML},
    author = {Joe Cheng and Carson Sievert and Barret Schloerke and Winston Chang and Yihui Xie and Jeff Allen},
    year = {2024},
    note = {R package version 0.5.8.9000, 
},
    url = {https://github.com/rstudio/htmltools},
  }