When using this data, please cite the original publication:

Additionally, you should cite the record:

@misc{hepdata.42996, author = "{D0 Collaboration}", title = "{Spin correlation in $t\bar{t}$ production from $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV}", howpublished = "{HEPData (collection)}", year = 2000, note = "\url{https://doi.org/10.17182/hepdata.42996}" }

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

@misc{hepdata.42996.v1, author = "{D0 Collaboration}", title = "{Spin correlation in $t\bar{t}$ production from $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV (Version 1)}", howpublished = "{HEPData (collection)}", year = 2000, note = "\url{https://doi.org/10.17182/hepdata.42996.v1}" }

You can also cite this table directly.

@misc{hepdata.42996.v1/t1, author = "{D0 Collaboration}", title = "{``Table 1'' of ``Spin correlation in $t\bar{t}$ production from $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV'' (Version 1)}", howpublished = "{HEPData (dataset)}", year = 2000, note = "\url{https://doi.org/10.17182/hepdata.42996.v1/t1}" }