To cite package ‘xts’ in publications use:

  Ryan JA, Ulrich JM (2024). _xts: eXtensible Time Series_. R package
  version 0.14.1, , <https://github.com/joshuaulrich/xts>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {xts: eXtensible Time Series},
    author = {Jeffrey A. Ryan and Joshua M. Ulrich},
    year = {2024},
    note = {R package version 0.14.1, 
},
    url = {https://github.com/joshuaulrich/xts},
  }