To cite package ‘vProlog’ in publications use:

  Craytor B (2026). _vProlog: Embeddable Prolog (Trealla) for R_. R
  package version 0.1.1, <https://github.com/wcraytor/vprolog>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {vProlog: Embeddable Prolog (Trealla) for R},
    author = {Bert Craytor},
    year = {2026},
    note = {R package version 0.1.1},
    url = {https://github.com/wcraytor/vprolog},
  }