%% You should probably cite rfc8496 instead of this I-D.
@techreport{york-p-charge-info-06,
    number =    {draft-york-p-charge-info-06},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-york-p-charge-info/06/},
    author =    {Dan York and Tolga Asveren},
    title =     {{P-Charge-Info - A Private Header Field (P-Header) Extension to the Session Initiation Protocol (SIP)}},
    pagetotal = 14,
    year =      2018,
    month =     mar,
    day =       5,
    abstract =  {This text documents the current usage of 'P-Charge-Info', an existing private Session Initiation Protocol (SIP) header field (P-header) used to convey billing information about the party to be charged. This P-Header is currently used in production by several equipment vendors and carriers. This document is submitted to request the registration of this header field with the Internet Assigned Numbers Authority (IANA). NOTE: This document is a simplified version of the document previously known as 'draft-york-dispatch-p-charge-info'.},
}