To cite package ‘PUPMCR’ in publications use:

  Zapanta N, Santos R, Pineda J, Alvarez L, Deocaris C (2024). _PUPMCR:
  Image-Based Identification of Color Based on Rayner (1970)
  Terminology and Known Fungal Pigments_. R package version 0.2.0,
  <https://CRAN.R-project.org/package=PUPMCR>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {PUPMCR: Image-Based Identification of Color Based on Rayner (1970)
Terminology and Known Fungal Pigments},
    author = {Niña Rose Zapanta and Rhenz Hannah Santos and Jericho Ivan Pineda and Lourdes Alvarez and Chester Deocaris},
    year = {2024},
    note = {R package version 0.2.0},
    url = {https://CRAN.R-project.org/package=PUPMCR},
  }