To cite magentabook in publications use:

  Coverdale, C. (2026). magentabook: HM Treasury Magenta Book Policy
  Evaluation Primitives. R package version 0.1.1.
  https://github.com/charlescoverdale/magentabook

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {magentabook: HM Treasury Magenta Book Policy Evaluation Primitives},
    author = {Charles Coverdale},
    year = {2026},
    note = {R package version 0.1.1},
    url = {https://github.com/charlescoverdale/magentabook},
  }

magentabook is aligned with the May 2026 republication of the HM
Treasury Magenta Book and its companion Annex A on analytical methods.
When magentabook is used to implement specific named methods, please
also cite the underlying primary source. The most common are: Sherman
et al. (1997) for the Maryland Scientific Methods Scale.  Cohen (1988)
for two-sample power analysis.  Hussey & Hughes (2007) and Hemming et
al. (2015) for stepped-wedge designs.  Hedges & Hedberg (2007) for ICC
reference values in education.  Drummond et al. (2015) for
cost-effectiveness analysis.  Cameron & Miller (2015) for
cluster-robust inference.  Stuart (2010) for pre-treatment balance
diagnostics.  HM Treasury (2026). The Magenta Book: Central Government
Guidance on Evaluation.  HM Treasury (2026). The Magenta Book: Annex A,
Analytical methods for use within an evaluation.  See the @references
block of each function for the full citation.