When using this data, please cite the original publication:

Additionally, you should cite the record:

@misc{hepdata.87256, author = "{ATLAS Collaboration}", title = "{Measurement of prompt photon production in $\sqrt{s_\mathrm{NN}} = 8.16$ TeV $p$+Pb collisions with ATLAS}", howpublished = "{HEPData (collection)}", year = 2019, note = "\url{https://doi.org/10.17182/hepdata.87256}" }

or, if you prefer, a specific version of the record:

@misc{hepdata.87256.v1, author = "{ATLAS Collaboration}", title = "{Measurement of prompt photon production in $\sqrt{s_\mathrm{NN}} = 8.16$ TeV $p$+Pb collisions with ATLAS (Version 1)}", howpublished = "{HEPData (collection)}", year = 2019, note = "\url{https://doi.org/10.17182/hepdata.87256.v1}" }

You can also cite this table directly.

@misc{hepdata.87256.v1/t3, author = "{ATLAS Collaboration}", title = "{``Table 3'' of ``Measurement of prompt photon production in $\sqrt{s_\mathrm{NN}} = 8.16$ TeV $p$+Pb collisions with ATLAS'' (Version 1)}", howpublished = "{HEPData (dataset)}", year = 2019, note = "\url{https://doi.org/10.17182/hepdata.87256.v1/t3}" }