To cite clusterSEs in publications use:

Justin Esarey and Andrew Menger (20179). Practical and Effective Approaches to Dealing with Clustered Data. Political Science Research and Methods 7(3), 541-549. URL: https://doi.org/10.1017/psrm.2017.42

Corresponding BibTeX entry:

  @Article{,
    title = {Practical and Effective Approaches to Dealing with
      Clustered Data},
    author = {Justin Esarey and Andrew Menger},
    journal = {Political Science Research and Methods},
    year = {2019},
    volume = {7},
    pages = {541-559},
    url = {https://doi.org/10.1017/psrm.2017.42},
  }