To cite package 'MTurkR' in publications use:

Thomas J. Leeper (2013). MTurkR: Access to Amazon Mechanical Turk Requester API via R. R package version 0.3.5.

Corresponding BibTeX entry:

  @Manual{,
    title = {MTurkR: Access to Amazon Mechanical Turk Requester API via
      R},
    author = {Thomas J. Leeper},
    year = {2013},
    note = {R package version 0.3.5},
  }