To cite package ‘qpdf’ in publications use:

Ooms J (2025). qpdf: Split, Combine and Compress PDF Files. R package version 1.4.1, https://CRAN.R-project.org/package=qpdf.

Corresponding BibTeX entry:

  @Manual{,
    title = {qpdf: Split, Combine and Compress PDF Files},
    author = {Jeroen Ooms},
    year = {2025},
    note = {R package version 1.4.1},
    url = {https://CRAN.R-project.org/package=qpdf},
  }