%% You should probably cite rfc6868 instead of this I-D.
@techreport{daboo-ical-vcard-parameter-encoding-00,
    number =    {draft-daboo-ical-vcard-parameter-encoding-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-daboo-ical-vcard-parameter-encoding/00/},
    author =    {Cyrus Daboo},
    title =     {{Parameter Value Encoding in iCalendar and vCard}},
    pagetotal = 5,
    year =      2012,
    month =     jul,
    day =       7,
    abstract =  {This specification defines an extension to iCalendar and vCard data formats to allow parameter values to include certain characters forbidden by the existing specifications.},
}