To cite package 'pollstR' in publications use:

Jeffrey B. Arnold and Thomas J. Leeper (2017). pollstR: R client for Pollster API. R package version 2.0.0.

Corresponding BibTeX entry:

  @Manual{,
    title = {pollstR: R client for Pollster API},
    author = {Jeffrey B. Arnold and Thomas J. Leeper},
    year = {2017},
    note = {R package version 2.0.0},
  }