To cite package ‘rcrossref’ in publications use:

  Chamberlain S, Zhu H, Jahn N, Boettiger C, Ram K (2024). _rcrossref:
  Client for Various 'CrossRef' 'APIs'_. R package version 1.2.009, ,
  <https://github.com/ropensci/rcrossref>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {rcrossref: Client for Various 'CrossRef' 'APIs'},
    author = {Scott Chamberlain and Hao Zhu and Najko Jahn and Carl Boettiger and Karthik Ram},
    year = {2024},
    note = {R package version 1.2.009, 
},
    url = {https://github.com/ropensci/rcrossref},
  }