This service has an associated publication. If you use its data, it may be appropriate to reference 1989A&A...224..299V (ADS BibTeX entry for the publication) either in addition to or instead of the service reference.
To cite the service as such, we suggest the following BibTeX entry:
@MISC{vo:plts_plates, year=2015, title={Scans of the Palomar-Leiden Trojan Survey Plates}, author={van Houten-Groeneveld, I. and van Houten, C.J. and Wisse-Schouten, M. and Bardwell, C. and Gehrels, T.}, url={https://dc.zah.uni-heidelberg.de/plts/q/web/info}, howpublished={{VO} resource provided by the {GAVO} Data Center}, doi = {10.21938/8jkMIdbl9xGrJn6_GDTzWA} }
Some services have additional advice or requests on citing in their copyright information. For this service, that is: