Cite VizieR catalogue

J/ApJ/923/223 (Zhu Y.)

Cite the catalogue (data) and the VizieR service
Bibtex 

@dataset{vizier:J/ApJ/923/223,
  author={Zhu Y., Becker G.D., Bosman S.E.I., Keating L.C., Christenson H.M.,Banados E., Bian F., Davies F.B., D'Odorico V., Eilers A.-C., Fan X.,Haehnelt M.G., Kulkarni G., Pallottini A., Qin Y., Wang F., Yang J.},
  title = {VLT/X-SHOOTER & Keck/ESI spectra of z~5 QSOs},
  publisher = { Centre de Donnees astronomique de Strasbourg (CDS) },
  doi = {https://doi.org/10.26093/cds/vizier.19230223}
}

Cite VizieR

VizieR service DOI: 10.26093/cds/vizier

Cite VizieR service only.
Bibtex: 
@MISC{vizier,
  author = { Ochsenbein F. et. al},
  title = "{ The VizieR database of astronomical catalogues }",
  publisher = "{ Centre de Donnees astronomique de Strasbourg (CDS) }",
  doi = {https://doi.org/10.26093/cds/vizier}
}

Cite article

Cite the article attached to the catalogue.
Citation by ADS: 2021ApJ...923..223Z

Acknowledging the VizieR Service

If the access to catalogues with VizieR was helpful for your research work,the following acknowledgment would be appreciated: 
"This research has made use of the VizieR catalogue access tool, CDS,
 Strasbourg, France (DOI : 10.26093/cds/vizier). The original description 
 of the VizieR service was published in 2000, A&AS 143, 23"

More information

Rules of usage for VizieR data
AAS policies