To cite package ‘formr’ in publications use:

  Arslan R (2014). _formr: formr survey framework_. R package version
  0.10.2, <https://github.com/rubenarslan/formr>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {formr: formr survey framework},
    author = {Ruben Arslan},
    year = {2014},
    note = {R package version 0.10.2},
    url = {https://github.com/rubenarslan/formr},
  }