%% You should probably cite draft-ietf-stox-im instead of this I-D.
@techreport{saintandre-sip-xmpp-im-03,
    number =    {draft-saintandre-sip-xmpp-im-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-saintandre-sip-xmpp-im/03/},
    author =    {Peter Saint-Andre and Avshalom Houri and Joe Hildebrand},
    title =     {{Interworking between the Session Initiation Protocol (SIP) and the Extensible Messaging and Presence Protocol (XMPP): Instant Messaging}},
    pagetotal = 10,
    year =      2013,
    month =     apr,
    day =       4,
    abstract =  {This document defines a bidirectional protocol mapping for the exchange of single instant messages between the Session Initiation Protocol (SIP) and the Extensible Messaging and Presence Protocol (XMPP).},
}