Cite VizieR catalogue

J/ApJS/174/136 (Caldwell J.A.R.)

Cite the catalogue (data) and the VizieR service
Bibtex 

@dataset{vizier:J/ApJS/174/136,
  author={Caldwell J.A.R., McIntosh D.H., Rix H.-W., Barden M., Beckwith S.V.W.,Bell E.F., Borch A., Heymans C., Haussler B., Jahnke K., Jogee S.,Meisenheimer K., Peng C.Y., Sanchez S.F., Somerville R.S., Wisotzki L.,Wolf C.},
  title = {GEMS survey data and catalog},
  publisher = { Centre de Donnees astronomique de Strasbourg (CDS) },
  doi = {https://doi.org/10.26093/cds/vizier.21740136}
}

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: 2008ApJS..174..136C

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