To cite package ‘twilio’ in publications use:

Kross S (2017). twilio: An Interface to the Twilio API for R. R package version 0.1.0, https://github.com/seankross/twilio.

Corresponding BibTeX entry:

  @Manual{,
    title = {twilio: An Interface to the Twilio API for R},
    author = {Sean Kross},
    year = {2017},
    note = {R package version 0.1.0},
    url = {https://github.com/seankross/twilio},
  }