To cite package 'iWeigReg' in publications use:

Tan Z, Shu H (2022). iWeigReg: Improved methods for causal inference and missing data problems. R package version 1.1.

Corresponding BibTeX entry:

  @Manual{,
    title = {iWeigReg: Improved methods for causal inference and
      missing data problems},
    author = {Zhiqiang Tan and Heng Shu},
    year = {2022},
    note = {R package version 1.1},
  }