To cite the 'patternplot' package in publications use:

Chunqiao Luo, Shasha Bai(2018). Versatile Pie Charts, Bar Charts and Box Plots using Patterns, Colors and Images. R package version 0.2.1.

Corresponding BibTeX entry:

  @Manual{,
    title = {Versatile Pie Charts, Bar Charts and Box Plots using
      Patterns, Colors and Images},
    author = {Chunqiao Luo and Shasha Bai},
    year = {2018},
    note = {R package version 0.2.1},
  }