To cite kfa in publications use:

Nickodem K, Halpin P (2022). kfa: K-Fold Cross-Validation for Factor Analysis. R package version 0.2.1, https://CRAN.R-project.org/package=kfa.

Corresponding BibTeX entry:

  @Manual{,
    title = {kfa: K-Fold Cross-Validation for Factor Analysis},
    author = {Kyle Nickodem and Peter Halpin},
    year = {2022},
    note = {R package version 0.2.1},
    url = {https://CRAN.R-project.org/package=kfa},
  }