To cite neuropsychology in publications use:

Makowski, D. (2016). Package 'neuropsychology': An R Toolbox for Psychologists, Neuropsychologists and Neuroscientists. Available from https://github.com/neuropsychology/neuropsychology.R

Corresponding BibTeX entry:

  @Manual{,
    title = {Package '{neuropsychology}': An R Toolbox for
      Psychologists, Neuropsychologists and Neuroscientists},
    author = {Dominique Makowski},
    year = {2016},
    note = {(0.5.0)},
    url = {https://github.com/neuropsychology/neuropsychology.R},
  }