%% You should probably cite rfc7658 instead of this I-D.
@techreport{perrault-behave-deprecate-nat-mib-v1-06,
    number =    {draft-perrault-behave-deprecate-nat-mib-v1-06},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-perrault-behave-deprecate-nat-mib-v1/06/},
    author =    {Simon Perreault and Tina Tsou (Ting ZOU) and Senthil Sivakumar and Tom Taylor},
    title =     {{Deprecation of MIB Module NAT-MIB: Managed Objects for Network Address Translators (NATs)}},
    pagetotal = 62,
    year =      2015,
    month =     jul,
    day =       6,
    abstract =  {This memo deprecates MIB module NAT-MIB, a portion of the Management Information Base (MIB) previously defined in RFC 4008 for devices implementing Network Address Translator (NAT) function. A companion document defines a new version, NATV2-MIB, which responds to deficiencies found in module NAT-MIB and adds new capabilities. This document obsoletes RFC 4008. All MIB objects specified in RFC 4008 are included in this version unchanged with only the STATUS changed to deprecated.},
}