To cite package ‘SpatPCA’ in publications use:

  Wang W, Huang H (2024). _SpatPCA: Regularized Principal Component
  Analysis for Spatial Data_. R package version 1.3.7, ,
  <https://github.com/egpivo/spatpca>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {SpatPCA: Regularized Principal Component Analysis for Spatial Data},
    author = {Wen-Ting Wang and Hsin-Cheng Huang},
    year = {2024},
    note = {R package version 1.3.7, 
},
    url = {https://github.com/egpivo/spatpca},
  }