To cite EFAtools in publications use:

Steiner M, Grieder S (2020). “EFAtools: An R package with fast and flexible implementations of exploratory factor analysis tools.” Journal of Open Source Software, 5(53), 2521. doi: 10.21105/joss.02521, https://doi.org/10.21105/joss.02521.

Corresponding BibTeX entry:

  @Article{,
    title = {EFAtools: An R package with fast and flexible
      implementations of exploratory factor analysis tools},
    author = {Markus D. Steiner and Silvia Grieder},
    journal = {Journal of Open Source Software},
    year = {2020},
    volume = {5},
    number = {53},
    pages = {2521},
    url = {https://doi.org/10.21105/joss.02521},
    doi = {10.21105/joss.02521},
  }