To cite package ‘geopsych’ in publications use:

  Zhang S (2025). _geopsych: Methods of Applied Psychology and
  Psychometrics in Geographical Analysis_. R package version 0.1.0,
  <https://github.com/zhangsui921/geopsych>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {geopsych: Methods of Applied Psychology and Psychometrics in Geographical
Analysis},
    author = {Sui Zhang},
    year = {2025},
    note = {R package version 0.1.0},
    url = {https://github.com/zhangsui921/geopsych},
  }