To cite package 'rioja' in publications use:

Juggins S (2022). rioja: Analysis of Quaternary Science Data. R package version 1.0-5, https://cran.r-project.org/package=rioja.

Corresponding BibTeX entry:

  @Manual{,
    title = {rioja: Analysis of Quaternary Science Data},
    author = {Steve Juggins},
    year = {2022},
    note = {R package version 1.0-5},
    url = {https://cran.r-project.org/package=rioja},
  }