To cite sure in publications use:

  Brandon M. Greenwell, Andrew J. McCarthy, Bradley C. Boehmke, Dungang
  Lui (2018). Residuals and diagnostics for binary and ordinal
  regression models: An introduction to the sure package. The R
  Journal, 10(1), 1--14. URL
  https://journal.r-project.org/archive/2018/RJ-2018-004/index.html.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Residuals and diagnostics for binary and ordinal regression models: An introduction to the sure package.},
    author = {Brandon M. Greenwell and Andrew J. McCarthy and Bradley C. Boehmke and Dungang Lui},
    journal = {The R Journal},
    year = {2018},
    volume = {10},
    number = {1},
    pages = {1--14},
    url = {https://journal.r-project.org/archive/2018/RJ-2018-004/index.html},
  }