To cite yfR in publications use:

  Perlin M (2023). _yfR: Downloads and Organizes Financial Data from
  Yahoo Finance_. R package version 1.1.0,
  <https://github.com/ropensci/yfR>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {yfR: Downloads and Organizes Financial Data from Yahoo Finance},
    author = {Marcelo Perlin},
    year = {2023},
    note = {R package version 1.1.0},
    url = {https://github.com/ropensci/yfR},
  }