To cite package 'aws.s3' in publications use:

Leeper TJ (2018). aws.s3: AWS S3 Client Package. R package version 0.3.12.1.

Corresponding BibTeX entry:

  @Manual{,
    title = {aws.s3: AWS S3 Client Package},
    author = {Thomas J. Leeper},
    year = {2018},
    note = {R package version 0.3.12.1},
  }