To cite package ‘folda’ in publications use:

  Wang S (2024). _folda: Forward Stepwise Discriminant Analysis with
  Pillai's Trace_. R package version 0.2.0,
  <https://CRAN.R-project.org/package=folda>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {folda: Forward Stepwise Discriminant Analysis with Pillai's Trace},
    author = {Siyu Wang},
    year = {2024},
    note = {R package version 0.2.0},
    url = {https://CRAN.R-project.org/package=folda},
  }