To cite package ‘bcaboot’ in publications use:

  Efron B, Narasimhan B (2020). “The Automatic Construction of
  Bootstrap Confidence Intervals.” _Journal of Computational and
  Graphical Statistics_, *29*(3), 608-619.
  doi:10.1080/10618600.2020.1714633
  <https://doi.org/10.1080/10618600.2020.1714633>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {The Automatic Construction of Bootstrap Confidence Intervals},
    author = {Bradley Efron and Balasubramanian Narasimhan},
    journal = {Journal of Computational and Graphical Statistics},
    year = {2020},
    volume = {29},
    number = {3},
    pages = {608--619},
    doi = {10.1080/10618600.2020.1714633},
    publisher = {Taylor & Francis},
  }
