To cite package ‘greenSD’ in publications use:

  Yang X (2026). _greenSD: Access and Analyze Global GreenSpace Spatial
  Data_. R package version 0.1.1,
  <https://github.com/billbillbilly/greensd>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {greenSD: Access and Analyze Global GreenSpace Spatial Data},
    author = {Xiaohao Yang},
    year = {2026},
    note = {R package version 0.1.1},
    url = {https://github.com/billbillbilly/greensd},
  }