To cite package 'PAutilities' in publications use:

  Paul R. Hibbing (2019). PAutilities: Streamline physical activity
  research. URL https://cran.r-project.org/package=PAutilities.

A BibTeX entry for LaTeX users is

  @Misc{,
    title = {PAutilities: Streamline physical activity research},
    author = {Paul R. Hibbing},
    year = {2019},
    url = {https://cran.r-project.org/package=PAutilities},
  }