To cite package 'clarifai' in publications use:

Sood G (2017). clarifai: R Client for the Clarifai API. R package version 0.4.2.

Corresponding BibTeX entry:

  @Manual{,
    title = {clarifai: R Client for the Clarifai API},
    author = {Gaurav Sood},
    year = {2017},
    note = {R package version 0.4.2},
  }