Long JA (2018). jtools: Analysis and Presentation of Social Scientific Data. R package version 1.1.1, https://cran.r-project.org/package=jtools.

Corresponding BibTeX entry:

  @Manual{jtools,
    title = {jtools: Analysis and Presentation of Social Scientific
      Data},
    author = {Jacob A. Long},
    year = {2018},
    note = {R package version 1.1.1},
    url = {https://cran.r-project.org/package=jtools},
  }