%% You should probably cite rfc8144 instead of this I-D.
@techreport{murchison-webdav-prefer-04,
    number =    {draft-murchison-webdav-prefer-04},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-murchison-webdav-prefer/04/},
    author =    {Kenneth Murchison},
    title =     {{Use of the Prefer Header Field in Web Distributed Authoring and Versioning (WebDAV)}},
    pagetotal = 29,
    year =      2013,
    month =     sep,
    day =       11,
    abstract =  {This specification defines how the HTTP Prefer header field can be used by a WebDAV client to request that certain behaviors be employed by a server while constructing a response to a successful request.},
}