To cite package ‘blackmarbler’ in publications use:

  Marty R, Stefanini Vicente G (2024). _blackmarbler: Black Marble Data
  and Statistics_. R package version 0.2.2,
  <https://CRAN.R-project.org/package=blackmarbler>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {blackmarbler: Black Marble Data and Statistics},
    author = {Robert Marty and Gabriel {Stefanini Vicente}},
    year = {2024},
    note = {R package version 0.2.2},
    url = {https://CRAN.R-project.org/package=blackmarbler},
  }