To cite package ‘substackR’ in publications use:

  R. J (2025). _substackR: Access Substack Data via API_. R package
  version 0.0.9, <https://github.com/posocap/substackr>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {substackR: Access Substack Data via API},
    author = {Jason R.},
    year = {2025},
    note = {R package version 0.0.9},
    url = {https://github.com/posocap/substackr},
  }