To cite package 'aws.signature' in publications use:

Thomas J. Leeper (2018). aws.signature: Amazon Web Services Request Signatures. R package version 0.4.4.

Corresponding BibTeX entry:

  @Manual{,
    title = {aws.signature: Amazon Web Services Request Signatures},
    author = {Thomas J. Leeper},
    year = {2018},
    note = {R package version 0.4.4},
  }