To cite package ‘quad’ in publications use:

  Sumner M (2024). _quad: Intermediate Forms of Raster Grids_. R
  package version 0.0.1, , <https://github.com/hypertidy/quad>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {quad: Intermediate Forms of Raster Grids},
    author = {Michael D. Sumner},
    year = {2024},
    note = {R package version 0.0.1, 
},
    url = {https://github.com/hypertidy/quad},
  }