To cite the service as such, we suggest the following BibTeX entry:
@MISC{vo:eiueilewpset, year=2007, title={{PDS}-{PPI} VO server}, author={Could be same as contact.name}, url={https://vo-pds-ppi.igpp.ucla.edu/__system__/services/root/info}, howpublished={{VO} resource provided by the {PDS}-{PPI} VO server} }