When using this data, please cite the original publication:

Additionally, you should cite the record:

@misc{hepdata.94315, author = "{ATLAS Collaboration}", title = "{A search for the $Z\gamma$ decay mode of the Higgs boson in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector}", howpublished = "{HEPData (collection)}", year = 2020, note = "\url{https://doi.org/10.17182/hepdata.94315}" }

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

@misc{hepdata.94315.v1, author = "{ATLAS Collaboration}", title = "{A search for the $Z\gamma$ decay mode of the Higgs boson in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector (Version 1)}", howpublished = "{HEPData (collection)}", year = 2020, note = "\url{https://doi.org/10.17182/hepdata.94315.v1}" }

You can also cite this table directly.

@misc{hepdata.94315.v1/t4, author = "{ATLAS Collaboration}", title = "{``Table 4'' of ``A search for the $Z\gamma$ decay mode of the Higgs boson in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector'' (Version 1)}", howpublished = "{HEPData (dataset)}", year = 2020, note = "\url{https://doi.org/10.17182/hepdata.94315.v1/t4}" }