To cite package 'pan' in publications use:

  Jing Hua Zhao and Joseph L. Schafer (2026). pan: Multiple imputation
  for multivariate panel or clustered dataR package version 2.0.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {pan: Multiple imputation for multivariate panel or clustered data},
    author = {Jing Hua Zhao and Joseph L. Schafer},
    year = {2026},
    note = {R package version 2.0},
  }