To cite package ‘endorse’ in publications use:

  Shiraito Y, Imai K (2022). _endorse: Bayesian Measurement Models for
  Analyzing Endorsement Experiments_. R package version 1.6.2,
  <https://CRAN.R-project.org/package=endorse>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {endorse: Bayesian Measurement Models for Analyzing Endorsement
Experiments},
    author = {Yuki Shiraito and Kosuke Imai},
    year = {2022},
    note = {R package version 1.6.2},
    url = {https://CRAN.R-project.org/package=endorse},
  }