To cite unikn in derivations and publications use:

Neth H, Gradwohl N (2020). unikn: Graphical elements of the University of Konstanz's corporate design. Social Psychology and Decision Sciences, University of Konstanz, Konstanz, Germany. R package (version 0.3.0, August 24, 2020), https://CRAN.R-project.org/package=unikn.

Corresponding BibTeX entry:

  @Manual{,
    title = {unikn: Graphical elements of the University of Konstanz's
      corporate design},
    author = {Hansjörg Neth and Nico Gradwohl},
    year = {2020},
    organization = {Social Psychology and Decision Sciences, University
      of Konstanz},
    address = {Konstanz, Germany},
    note = {R package (version 0.3.0, August 24, 2020)},
    url = {https://CRAN.R-project.org/package=unikn},
  }