To cite package ‘spfa’ in publications use:

Liu Y, Wang W (2023). spfa: Semi-Parametric Factor Analysis. R package version 1.0, https://CRAN.R-project.org/package=spfa.

Corresponding BibTeX entry:

  @Manual{,
    title = {spfa: Semi-Parametric Factor Analysis},
    author = {Yang Liu and Weimeng Wang},
    year = {2023},
    note = {R package version 1.0},
    url = {https://CRAN.R-project.org/package=spfa},
  }