To cite the umg package in publications use:

  Yu, H.-T. (2026). umg: Unified Model Graphs for statistical models in
  psychology (R package version 0.6.1).
  https://hsiutingyu.github.io/umg/

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {umg: Unified Model Graphs for Statistical Models in Psychology},
    author = {Hsiu-Ting Yu},
    year = {2026},
    note = {R package version 0.6.1},
    url = {https://hsiutingyu.github.io/umg/},
  }