To cite the service as such, we suggest the following BibTeX entry:
@MISC{vo:ADQL_tables, year=2008, title={{INAF}-{OATs} {VESPA} Data Service Hub Public Tables}, author={Could be same as contact.name}, url={http://vespa.ia2.inaf.it/__system__/dc_tables/list/info}, howpublished={{VO} resource provided by the {INAF}-{OATs} {VESPA} Data Service Hub} }