When using this data, please cite the original publication:

Additionally, you should cite the record:

@misc{hepdata.76735, author = "{CMS Collaboration}", title = "{Measurement of the ttbbar production cross section using events in the e mu final state in pp collisions at sqrt(s)=13 TeV}", howpublished = "{HEPData (collection)}", year = 2017, note = "\url{https://doi.org/10.17182/hepdata.76735}" }

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

@misc{hepdata.76735.v1, author = "{CMS Collaboration}", title = "{Measurement of the ttbbar production cross section using events in the e mu final state in pp collisions at sqrt(s)=13 TeV (Version 1)}", howpublished = "{HEPData (collection)}", year = 2017, note = "\url{https://doi.org/10.17182/hepdata.76735.v1}" }

You can also cite this table directly.

@misc{hepdata.76735.v1/t3, author = "{CMS Collaboration}", title = "{``Table 3'' of ``Measurement of the ttbbar production cross section using events in the e mu final state in pp collisions at sqrt(s)=13 TeV'' (Version 1)}", howpublished = "{HEPData (dataset)}", year = 2017, note = "\url{https://doi.org/10.17182/hepdata.76735.v1/t3}" }