To cite package ‘preregr’ in publications use:

Peters G (2023). preregr: Specify (Pre)Registrations and Export Them Human- And Machine-Readably. R package version 0.2.9, https://CRAN.R-project.org/package=preregr.

Corresponding BibTeX entry:

  @Manual{,
    title = {preregr: Specify (Pre)Registrations and Export Them Human-
      And Machine-Readably},
    author = {Gjalt-Jorn Peters},
    year = {2023},
    note = {R package version 0.2.9},
    url = {https://CRAN.R-project.org/package=preregr},
  }