To cite the 'mnlfa' package in publications use:

  Robitzsch, A. (2024). mnlfa: Moderated nonlinear factor analysis. R
  package version 0.4-2. https://CRAN.R-project.org/package=mnlfa

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {mnlfa: Moderated nonlinear factor analysis},
    author = {Alexander Robitzsch},
    year = {2024},
    note = {R package version 0.4-2},
    url = {https://CRAN.R-project.org/package=mnlfa},
  }