To cite package ‘factorselect’ in publications use:

  Parker J (2026). _factorselect: Eigenvalue-Based Estimation of the
  Number of Factors in Approximate Factor Models_. R package version
  0.1.2, <https://github.com/penny4nonsense/factorselect>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {factorselect: Eigenvalue-Based Estimation of the Number of Factors in
Approximate Factor Models},
    author = {Jason Parker},
    year = {2026},
    note = {R package version 0.1.2},
    url = {https://github.com/penny4nonsense/factorselect},
  }