%% You should probably cite rfc8633 instead of this I-D.
@techreport{ietf-ntp-bcp-01,
    number =    {draft-ietf-ntp-bcp-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-ntp-bcp/01/},
    author =    {Denis Reilly and Harlan Stenn and Dieter Sibold},
    title =     {{Network Time Protocol Best Current Practices}},
    pagetotal = 20,
    year =      2016,
    month =     oct,
    day =       4,
    abstract =  {NTP Version 4 (NTPv4) has been widely used since its publication as RFC 5905 {[}RFC5905{]}. This documentation is a collection of Best Practices from across the NTP community.},
}