%% You should probably cite draft-ietf-ftpext2-hosts instead of this I-D.
@techreport{hethmon-mcmurray-ftp-hosts-15,
    number =    {draft-hethmon-mcmurray-ftp-hosts-15},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-hethmon-mcmurray-ftp-hosts/15/},
    author =    {Paul Hethmon and Robert McMurray},
    title =     {{File Transfer Protocol HOST Command for Virtual Hosts}},
    pagetotal = 20,
    year =      2010,
    month =     jun,
    day =       24,
    abstract =  {This document defines a new FTP command that provides a mechanism for FTP clients and servers to identify individual virtual hosts on an FTP server.},
}