When using this data, please cite the original publication:

Additionally, you should cite the record:

@misc{hepdata.29912, author = "{DM2 Collaboration}", title = "{Measurement of the Reaction $e^+ e^- \to \eta \pi^+ \pi^-$ in the Center-of-mass Energy Interval 1350-{MeV} to 2400-{MeV}}", howpublished = "{HEPData (collection)}", year = 1988, note = "\url{https://doi.org/10.17182/hepdata.29912}" }

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

@misc{hepdata.29912.v1, author = "{DM2 Collaboration}", title = "{Measurement of the Reaction $e^+ e^- \to \eta \pi^+ \pi^-$ in the Center-of-mass Energy Interval 1350-{MeV} to 2400-{MeV} (Version 1)}", howpublished = "{HEPData (collection)}", year = 1988, note = "\url{https://doi.org/10.17182/hepdata.29912.v1}" }

You can also cite this table directly.

@misc{hepdata.29912.v1/t1, author = "{DM2 Collaboration}", title = "{``Table 1'' of ``Measurement of the Reaction $e^+ e^- \to \eta \pi^+ \pi^-$ in the Center-of-mass Energy Interval 1350-{MeV} to 2400-{MeV}'' (Version 1)}", howpublished = "{HEPData (dataset)}", year = 1988, note = "\url{https://doi.org/10.17182/hepdata.29912.v1/t1}" }