To cite package ‘nortest’ in publications use:

Gross J, Ligges U (2015). nortest: Tests for Normality. R package version 1.0-4, https://CRAN.R-project.org/package=nortest.

Corresponding BibTeX entry:

  @Manual{,
    title = {nortest: Tests for Normality},
    author = {Juergen Gross and Uwe Ligges},
    year = {2015},
    note = {R package version 1.0-4},
    url = {https://CRAN.R-project.org/package=nortest},
  }