To cite package ‘leapfrog’ in publications use:

  Imai-Eaton J, Walters M, Ashton R, Kusumgar M (2026). _leapfrog:
  Multistate Population Projection Model for Demographic and HIV
  Estimation_. R package version 0.1.8,
  <https://github.com/hivtools/leapfrog>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {leapfrog: Multistate Population Projection Model for Demographic and HIV
Estimation},
    author = {Jeffrey Imai-Eaton and Magdalene Walters and Robert Ashton and Mantra Kusumgar},
    year = {2026},
    note = {R package version 0.1.8},
    url = {https://github.com/hivtools/leapfrog},
  }