To cite package ‘lavaanExtra’ in publications use:

  Thériault, R., (2023). lavaanExtra: Convenience Functions for Package
  lavaan. *Journal of Open Source Software*, *8*(90), 5701,
  https://doi.org/10.21105/joss.05701

A BibTeX entry for LaTeX users is

  @Article{,
    doi = {10.21105/joss.05701},
    url = {https://doi.org/10.21105/joss.05701},
    year = {2023},
    publisher = {The Open Journal},
    volume = {8},
    number = {90},
    pages = {5701},
    author = {Rémi Thériault},
    title = {lavaanExtra: Convenience functions for lavaan},
    journal = {Journal of Open Source Software},
  }