To cite package ‘EFAfactors’ in publications use:

  Qin H, Guo L (2025). _EFAfactors: Determining the Number of Factors
  in Exploratory Factor Analysis_. R package version 1.2.1,
  <https://CRAN.R-project.org/package=EFAfactors>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {EFAfactors: Determining the Number of Factors in Exploratory Factor Analysis},
    author = {Haijiang Qin and Lei Guo},
    year = {2025},
    note = {R package version 1.2.1},
    url = {https://CRAN.R-project.org/package=EFAfactors},
  }