To cite ROCnReg in publications use:

  Maria Xose Rodriguez-Alvarez, Vanda Inacio (2021). ROCnReg: An R
  Package for Receiver Operating Characteristic Curve Inference With
  and Without Covariates. The R Journal, 13(1), 525-555. DOI
  10.32614/RJ-2021-066.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {{ROCnReg}: An {R} Package for Receiver Operating Characteristic
          Curve Inference With and Without Covariates},
    author = {Mar{\'i}a Xos{\'e} Rodr{\'i}guez-{\'A}lvarez and Vanda In{\'a}cio},
    journal = {The R Journal},
    year = {2021},
    volume = {13},
    number = {1},
    pages = {525--555},
    doi = {10.32614/RJ-2021-066},
  }