When using this data, please cite the original publication:

Additionally, you should cite the record:

@misc{hepdata.105039, author = "{ATLAS Collaboration}", title = "{Measurement of the $t\bar{t}t\bar{t}$ production cross section in $pp$ collisions at $\sqrt{s}$=13 TeV with the ATLAS detector}", howpublished = "{HEPData (collection)}", year = 2021, note = "\url{https://doi.org/10.17182/hepdata.105039}" }

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

@misc{hepdata.105039.v1, author = "{ATLAS Collaboration}", title = "{Measurement of the $t\bar{t}t\bar{t}$ production cross section in $pp$ collisions at $\sqrt{s}$=13 TeV with the ATLAS detector (Version 1)}", howpublished = "{HEPData (collection)}", year = 2021, note = "\url{https://doi.org/10.17182/hepdata.105039.v1}" }

You can also cite this resource directly.

@misc{hepdata.105039.v1/r2, author = "{ATLAS Collaboration}", title = "{``workspace_Comb.json'' of ``Measurement of the $t\bar{t}t\bar{t}$ production cross section in $pp$ collisions at $\sqrt{s}$=13 TeV with the ATLAS detector'' (Version 1)}", howpublished = "{HEPData (other)}", year = 2021, note = "\url{https://doi.org/10.17182/hepdata.105039.v1/r2}" }