To cite package 'MTurkR' in publications use:

Thomas J. Leeper (2014). MTurkR: Access to Amazon Mechanical Turk Requester API via R. R package version 0.4.

Corresponding BibTeX entry:

  @Manual{,
    title = {MTurkR: Access to Amazon Mechanical Turk Requester API via
      R},
    author = {Thomas J. Leeper},
    year = {2014},
    note = {R package version 0.4},
  }