To cite package ‘PSpower’ in publications use:

  Liu B (2025). _PSpower: Sample Size Calculation for Propensity Score
  Analysis_. R package version 0.1.0,
  <https://github.com/laubok/pspower>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {PSpower: Sample Size Calculation for Propensity Score Analysis},
    author = {Bo Liu},
    year = {2025},
    note = {R package version 0.1.0},
    url = {https://github.com/laubok/pspower},
  }