To cite package ‘rectpacker’ in publications use:

  Cheng M, Barrett S (2024). _rectpacker: Rectangle Packing_. R package
  version 1.0.0.9000, <https://github.com/coolbutuseless/rectpacker>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {rectpacker: Rectangle Packing},
    author = {Mike Cheng and Sean Barrett},
    year = {2024},
    note = {R package version 1.0.0.9000},
    url = {https://github.com/coolbutuseless/rectpacker},
  }