To cite yfR in publications use:

Perlin M (2022). yfR: Downloads and Organizes Financial Data from Yahoo Finance. R package version 1.0.4, https://github.com/ropensci/yfR.

Corresponding BibTeX entry:

  @Manual{,
    title = {yfR: Downloads and Organizes Financial Data from Yahoo
      Finance},
    author = {Marcelo Perlin},
    year = {2022},
    note = {R package version 1.0.4},
    url = {https://github.com/ropensci/yfR},
  }