To cite package ‘Hmisc’ in publications use:

  Harrell Jr F (2024). _Hmisc: Harrell Miscellaneous_. R package
  version 5.1-4, <https://github.com/harrelfe/hmisc>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {Hmisc: Harrell Miscellaneous},
    author = {Frank E {Harrell Jr}},
    year = {2024},
    note = {R package version 5.1-4},
    url = {https://github.com/harrelfe/hmisc},
  }