To cite loinc in publications use:

  Ernest Guevarra (2026). _roinc: Interface to the Logical Observation
  Identifiers Names and Codes (LOINC) API_. doi:10.5281/zenodo.22831698
  <https://doi.org/10.5281/zenodo.22831698>. R package version
  0.0.9003, <https://oxford-ihtm.io/roinc/>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {roinc: Interface to the Logical Observation Identifiers Names and Codes (LOINC) API},
    author = {{Ernest Guevarra}},
    year = {2026},
    note = {R package version 0.0.9003},
    url = {https://oxford-ihtm.io/roinc/},
    doi = {10.5281/zenodo.22831698},
  }