To cite package ‘landmarked’ in publications use:

  Brown C (2026). _landmarked: Plot Adjusted Kaplan-Meier Estimates
  from a Landmark Time_. R package version 0.2.0,
  <https://github.com/cstats/landmarked>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {landmarked: Plot Adjusted Kaplan-Meier Estimates from a Landmark Time},
    author = {Chris Brown},
    year = {2026},
    note = {R package version 0.2.0},
    url = {https://github.com/cstats/landmarked},
  }