To cite plotROC in publications use:

Michael C. Sachs (2015). plotROC: Generate Useful ROC Curve Charts for Print and Interactive Use. R package version 1.3.3.

Corresponding BibTeX entry:

  @Manual{,
    title = {plotROC: Generate Useful ROC Curve Charts for Print and
      Interactive Use},
    author = {Michael C. Sachs},
    year = {2015},
    note = {R package version 1.3.3},
    url = {http://sachsmc.github.io/plotROC},
  }