To cite the 'mdmb' package in publications use:

Robitzsch, A., & Luedtke, O. (2018). mdmb: Model based treatment of missing data. R package version 0.10-13. https://CRAN.R-project.org/package=mdmb

Corresponding BibTeX entry:

  @Manual{,
    title = {mdmb: Model Based Treatment of Missing Data},
    author = {Alexander Robitzsch and Oliver Luedtke},
    year = {2018},
    note = {R package version 0.10-13},
    url = {https://CRAN.R-project.org/package=mdmb},
  }