%% You should probably cite draft-ietf-jmap-jscontact-vcard instead of this I-D.
@techreport{loffredo-jmap-jscontact-vcard-03,
    number =    {draft-loffredo-jmap-jscontact-vcard-03},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-loffredo-jmap-jscontact-vcard/03/},
    author =    {Mario Loffredo and Robert Stepanek},
    title =     {{JSContact: Converting from and to vCard}},
    pagetotal = 37,
    year =      2020,
    month =     jun,
    day =       22,
    abstract =  {This document provides informational guidance for converting the contact card defined by JSContact specification, namely JSCard, from and to vCard.},
}