To cite package ‘shinythemes’ in publications use:

  Chang W (2024). _shinythemes: Themes for Shiny_. R package version
  1.2.0, <https://github.com/rstudio/shinythemes>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {shinythemes: Themes for Shiny},
    author = {Winston Chang},
    year = {2024},
    note = {R package version 1.2.0},
    url = {https://github.com/rstudio/shinythemes},
  }