To cite auctestr in publications use:

Josh Gardner (2017). Dates and Times Made Easy with lubridate. Model Evaluation with auctestr. URL https://github.com/jpgard/auctestr.

Corresponding BibTeX entry:

  @Unpublished{,
    title = {Model Evaluation with {auctestr}},
    author = {Josh Gardner},
    year = {2017},
    note = {Publication expected after acceptance to CRAN.},
    url = {https://github.com/jpgard/auctestr},
  }