When using this data, please cite the original publication:

Additionally, you should cite the record:

@misc{hepdata.66907, author = "{CMS Collaboration}", title = "{Measurement of the t t-bar production cross section in pp collisions at sqrt(s) = 7 TeV with lepton + jets final states}", howpublished = "{HEPData (collection)}", year = 2015, note = "\url{https://doi.org/10.17182/hepdata.66907}" }

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

@misc{hepdata.66907.v1, author = "{CMS Collaboration}", title = "{Measurement of the t t-bar production cross section in pp collisions at sqrt(s) = 7 TeV with lepton + jets final states (Version 1)}", howpublished = "{HEPData (collection)}", year = 2015, note = "\url{https://doi.org/10.17182/hepdata.66907.v1}" }

You can also cite this table directly.

@misc{hepdata.66907.v1/t3, author = "{CMS Collaboration}", title = "{``Table 3'' of ``Measurement of the t t-bar production cross section in pp collisions at sqrt(s) = 7 TeV with lepton + jets final states'' (Version 1)}", howpublished = "{HEPData (dataset)}", year = 2015, note = "\url{https://doi.org/10.17182/hepdata.66907.v1/t3}" }