To cite package ‘readxl’ in publications use:

  Wickham H, Bryan J (2024). _readxl: Read Excel Files_. R package
  version 1.4.3.9000, , <https://github.com/tidyverse/readxl>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {readxl: Read Excel Files},
    author = {Hadley Wickham and Jennifer Bryan},
    year = {2024},
    note = {R package version 1.4.3.9000, },
    url = {https://github.com/tidyverse/readxl},
  }