To cite package ‘promises’ in publications use:

  Cheng J (2024). _promises: Abstractions for Promise-Based
  Asynchronous Programming_. R package version 1.2.1.9001, ,
  <https://github.com/rstudio/promises>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {promises: Abstractions for Promise-Based Asynchronous Programming},
    author = {Joe Cheng},
    year = {2024},
    note = {R package version 1.2.1.9001, 
},
    url = {https://github.com/rstudio/promises},
  }