To cite package ‘regress3d’ in publications use:

  Foster-Molina E (2025). _regress3d: Create 3D Regression Surfaces_. R
  package version 1.0.0.9000,
  <https://github.com/ellafostermolina/regress3d>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {regress3d: Create 3D Regression Surfaces},
    author = {Ella Foster-Molina},
    year = {2025},
    note = {R package version 1.0.0.9000},
    url = {https://github.com/ellafostermolina/regress3d},
  }