To cite package ‘obsplot’ in publications use:

  Barnier J (2021). _obsplot: Create Charts with 'Observable Plot'_. R
  package version 0.0.2.9000, <https://github.com/juba/obsplot>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {obsplot: Create Charts with 'Observable Plot'},
    author = {Julien Barnier},
    year = {2021},
    note = {R package version 0.0.2.9000},
    url = {https://github.com/juba/obsplot},
  }