To cite package ‘regrap’ in publications use:

Gou J, Zhang F (2020). regrap: Reverse Graphical Approaches. R package version 1.0.1, https://CRAN.R-project.org/package=regrap.

Corresponding BibTeX entry:

  @Manual{,
    title = {regrap: Reverse Graphical Approaches},
    author = {Jiangtao Gou and Fengqing Zhang},
    year = {2020},
    note = {R package version 1.0.1},
    url = {https://CRAN.R-project.org/package=regrap},
  }