To cite modsem in publications use:

Slupphaug, K. S., Mehmetoglu, M., & Mittner, M. (2024). modsem: An R package for estimating latent interactions and quadratic effects. Structural Equation Modeling: A Multidisciplinary Journal https://doi.org/10.1080/10705511.2024.2417409

Corresponding BibTeX entry:

  @Article{,
    title = {modsem: An R package for estimating latent interactions
      and quadratic effects},
    author = {Kjell Solem Slupphaug and Mehmet Mehmetoglu and Matthias
      Mittner},
    journal = {Structural Equation Modeling: A Multidisciplinary
      Journal},
    year = {2025},
    volume = {32},
    number = {4},
    pages = {717-729},
    doi = {10.1080/10705511.2024.2417409},
  }