To cite package ‘caesar’ in publications use:

Kaplan J (2020). caesar: Encrypts and Decrypts Strings. R package version 1.1.1, https://github.com/jacobkap/caesar.

Corresponding BibTeX entry:

  @Manual{,
    title = {caesar: Encrypts and Decrypts Strings},
    author = {Jacob Kaplan},
    year = {2020},
    note = {R package version 1.1.1},
    url = {https://github.com/jacobkap/caesar},
  }