To cite package ‘cumprinc’ in publications use:

Richardson J (2022). cumprinc: Functions Centered Around Microsoft Excel Cumprinc Function. R package version 0.1, https://CRAN.R-project.org/package=cumprinc.

Corresponding BibTeX entry:

  @Manual{,
    title = {cumprinc: Functions Centered Around Microsoft Excel
      Cumprinc Function},
    author = {Jason Richardson},
    year = {2022},
    note = {R package version 0.1},
    url = {https://CRAN.R-project.org/package=cumprinc},
  }