To cite gtexr in publications use:

  Warwick A, Olvera-Barrios A, Ung C, Luben R (2026). “trud: An R
  interface to the NHS England Technology Reference data Update
  Distribution (TRUD) API.” _Journal of Open Source Software_,
  *11*(117), 9000. doi:10.21105/joss.09000
  <https://doi.org/10.21105/joss.09000>.
  <https://doi.org/10.21105/joss.09000>.

A BibTeX entry for LaTeX users is

  @Article{Warwick2026,
    title = {trud: An R interface to the NHS England Technology Reference data Update Distribution (TRUD) API},
    author = {Alasdair Neil Warwick and Abraham Olvera-Barrios and Chuin Ying Ung and Robert Luben},
    journal = {Journal of Open Source Software},
    year = {2026},
    volume = {11},
    number = {117},
    pages = {9000},
    doi = {10.21105/joss.09000},
    url = {https://doi.org/10.21105/joss.09000},
  }

  Warwick A, Luben R, Olvera-Barrios A, Ung C (2024). _Query the NHS
  TRUD API_. <https://github.com/ropensci/trud/>.

A BibTeX entry for LaTeX users is

  @Manual{trud,
    title = {Query the NHS TRUD API},
    author = {Alasdair Warwick and Robert Luben and Abraham Olvera-Barrios and Chuin Ying Ung},
    year = {2024},
    url = {https://github.com/ropensci/trud/},
  }