To cite package ‘dotenv’ in publications use:

  Csárdi G (2024). _dotenv: Load Environment Variables from '.env'_. R
  package version 1.0.3.9000, <https://github.com/gaborcsardi/dotenv>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {dotenv: Load Environment Variables from '.env'},
    author = {Gábor Csárdi},
    year = {2024},
    note = {R package version 1.0.3.9000},
    url = {https://github.com/gaborcsardi/dotenv},
  }