%% You should probably cite rfc3939 instead of this I-D.
@techreport{ema-vpim-clid-09,
    number =    {draft-ema-vpim-clid-09},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ema-vpim-clid/09/},
    author =    {Glenn Parsons and Janusz Maruszak},
    title =     {{Calling Line Identification for Voice Mail Messages}},
    pagetotal = 11,
    year =      2004,
    month =     jun,
    day =       14,
    abstract =  {This document describes a method for identifying the originating calling party in the headers of a stored voice mail message. Two new header fields are defined for this purpose: Caller\_ID and Called\_Name. Caller\_id is used to store sufficient information for the recipient to callback, or reply to, the sender of the message. Caller-name provides the name of the person sending the message. {[}STANDARDS-TRACK{]}},
}