To cite microsynth in publications use:

Robbins MW, Davenport S (2021). “microsynth: Synthetic Control Methods for Disaggregated and Micro-Level Data in R.” Journal of Statistical Software, 97(2), 1–31. doi:10.18637/jss.v097.i02.

Corresponding BibTeX entry:

  @Article{,
    title = {{microsynth}: Synthetic Control Methods for Disaggregated
      and Micro-Level Data in {R}},
    author = {Michael W. Robbins and Steven Davenport},
    journal = {Journal of Statistical Software},
    year = {2021},
    volume = {97},
    number = {2},
    pages = {1--31},
    doi = {10.18637/jss.v097.i02},
  }