To cite package ‘collett’ in publications use:

  Clements M (2025). _collett: Datasets from "Modelling Survival Data
  in Medical Research" by Collett_. R package version 0.1.0,
  <https://github.com/mclements/collett>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {collett: Datasets from "Modelling Survival Data in Medical Research" by
Collett},
    author = {Mark Clements},
    year = {2025},
    note = {R package version 0.1.0},
    url = {https://github.com/mclements/collett},
  }