To cite package ‘spacesXYZ’ in publications use:

  Davis G (2025). _spacesXYZ: CIE XYZ and some of Its Derived Color
  Spaces_. R package version 1.5-1,
  <https://CRAN.R-project.org/package=spacesXYZ>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {spacesXYZ: CIE XYZ and some of Its Derived Color Spaces},
    author = {Glenn Davis},
    year = {2025},
    note = {R package version 1.5-1},
    url = {https://CRAN.R-project.org/package=spacesXYZ},
  }