To cite package ‘DPI’ in publications use:

Bao H (2026). DPI: The Directed Prediction Index for Causal Direction Inference from Observational Data. R package version 2026.2, https://github.com/psychbruce/dpi.

Corresponding BibTeX entry:

  @Manual{,
    title = {DPI: The Directed Prediction Index for Causal Direction
      Inference from Observational Data},
    author = {Han Wu Shuang Bao},
    year = {2026},
    note = {R package version 2026.2},
    url = {https://github.com/psychbruce/dpi},
  }