To cite carat in publications use:

  Ma W, Ye X, Tu F, Hu F (2023). “carat: An R Package for
  Covariate-Adaptive Randomization in Clinical Trials.” _Journal of
  Statistical Software_, *107*(2), 1-47. doi:10.18637/jss.v107.i02
  <https://doi.org/10.18637/jss.v107.i02>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {{carat}: An {R} Package for Covariate-Adaptive Randomization in Clinical Trials},
    author = {Wei Ma and Xiaoqing Ye and Fuyi Tu and Feifang Hu},
    journal = {Journal of Statistical Software},
    year = {2023},
    volume = {107},
    number = {2},
    pages = {1--47},
    doi = {10.18637/jss.v107.i02},
  }