To cite package ‘png’ in publications use:

Urbanek S (2026). png: Read and write PNG images. R package version 0.1-9, https://CRAN.R-project.org/package=png.

Corresponding BibTeX entry:

  @Manual{,
    title = {png: Read and write PNG images},
    author = {Simon Urbanek},
    year = {2026},
    note = {R package version 0.1-9},
    url = {https://CRAN.R-project.org/package=png},
  }