To cite package ‘uaparserjs’ in publications use:

  Rudis B, Simon L, Langel T (2020). _uaparserjs: Parse 'User-Agent'
  Strings_. R package version 0.3.5,
  <https://gitlab.com/hrbrmstr/uaparserjs>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {uaparserjs: Parse 'User-Agent' Strings},
    author = {Bob Rudis and Lindsey Simon and Tobie Langel},
    year = {2020},
    note = {R package version 0.3.5},
    url = {https://gitlab.com/hrbrmstr/uaparserjs},
  }