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

Thomas J. Leeper (2017). aws.signature: Amazon Web Services Request Signatures. R package version 0.3.5.

Corresponding BibTeX entry:

  @Manual{,
    title = {aws.signature: Amazon Web Services Request Signatures},
    author = {Thomas J. Leeper},
    year = {2017},
    note = {R package version 0.3.5},
  }