To cite ggchangepoint in publications, cite the package. Please also cite the changepoint method you used: cpt_cite(fit) prints its reference.

Yu Y (2026). ggchangepoint: Combines Changepoint Analysis with ggplot2. R package version 0.5.0, https://pursuitofdatascience.github.io/ggchangepoint/.

Corresponding BibTeX entry:

  @Manual{,
    title = {{ggchangepoint}: Combines Changepoint Analysis with
      {ggplot2}},
    author = {Youzhi Yu},
    year = {2026},
    note = {R package version 0.5.0},
    url = {https://pursuitofdatascience.github.io/ggchangepoint/},
  }