To cite xtpqardl in publications use:

  Alkhalaf M (2026). _Panel Quantile Autoregressive Distributed Lag
  Model_. doi:10.32614/CRAN.package.xtpqardl
  <https://doi.org/10.32614/CRAN.package.xtpqardl>. R package version
  1.0.1, <https://CRAN.R-project.org/package=xtpqardl>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {Panel Quantile Autoregressive Distributed Lag Model},
    author = {Muhammad Abdullah Alkhalaf},
    year = {2026},
    note = {R package version 1.0.1},
    url = {https://CRAN.R-project.org/package=xtpqardl},
    doi = {10.32614/CRAN.package.xtpqardl},
  }