To cite the 'miceadds' package in publications use:

Robitzsch A, Grund S (2020). miceadds: Some Additional Multiple Imputation Functions, Especially for 'mice'. R package version 3.9-14, https://CRAN.R-project.org/package=miceadds.

Corresponding BibTeX entry:

  @Manual{miceadds_3.9-14,
    title = {miceadds: Some Additional Multiple Imputation Functions,
      Especially for 'mice'},
    author = {Alexander Robitzsch and Simon Grund},
    year = {2020},
    note = {R package version 3.9-14},
    url = {https://CRAN.R-project.org/package=miceadds},
  }