To cite package ‘vsp’ in publications use:

  Rohe K, Zeng M, Hayes A, Chen F (2024). _vsp: Vintage Sparse PCA for
  Semi-Parametric Factor Analysis_. R package version 0.1.2,
  <https://CRAN.R-project.org/package=vsp>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {vsp: Vintage Sparse PCA for Semi-Parametric Factor Analysis},
    author = {Karl Rohe and Muzhe Zeng and Alex Hayes and Fan Chen},
    year = {2024},
    note = {R package version 0.1.2},
    url = {https://CRAN.R-project.org/package=vsp},
  }