To cite package ‘fastpng’ in publications use:

  Cheng M, Randy408, The PNG Reference Library Authors (2024).
  _fastpng: Read and Write PNG Files with Configurable Decoder/Encoder
  Options_. R package version 0.1.5,
  <https://CRAN.R-project.org/package=fastpng>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fastpng: Read and Write PNG Files with Configurable Decoder/Encoder
Options},
    author = {Mike Cheng and {Randy408} and {The PNG Reference Library Authors}},
    year = {2024},
    note = {R package version 0.1.5},
    url = {https://CRAN.R-project.org/package=fastpng},
  }