To cite package ‘imfr’ in publications use:

  Gandrud C, Smith C (2023). _imfr: Download Data from the
  International Monetary Fund's Data API_. R package version 0.2.0.1,
  <https://github.com/christophergandrud/imfr>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {imfr: Download Data from the International Monetary Fund's Data API},
    author = {Christopher Gandrud and Christopher Smith},
    year = {2023},
    note = {R package version 0.2.0.1},
    url = {https://github.com/christophergandrud/imfr},
  }