To cite the 'srm' package in publications use:

  Nestler, S., Robitzsch, A., & Luedtke, O. (2022). srm: Structural
  equation modeling for the social relations model. R package version
  0.5-1. https://CRAN.R-project.org/package=srm

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {srm: Structural equation modeling for the social relations model},
    author = {Steffen Nestler and Alexander Robitzsch and Oliver Luedtke},
    year = {2022},
    note = {R package version 0.5-1},
    url = {https://CRAN.R-project.org/package=srm},
  }