To cite package ‘tenispolaR’ in publications use:

  Filho A (2019). _tenispolaR: Provides ZENIT-POLAR Substitution Cipher
  Method of Encryption_. R package version 0.2.1,
  <https://github.com/adelmofilho/tenispolar>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {tenispolaR: Provides ZENIT-POLAR Substitution Cipher Method of Encryption},
    author = {Adelmo Filho},
    year = {2019},
    note = {R package version 0.2.1},
    url = {https://github.com/adelmofilho/tenispolar},
  }