%% You should probably cite rfc7839 instead of this I-D.
@techreport{ietf-dhc-access-network-identifier-13,
    number =    {draft-ietf-dhc-access-network-identifier-13},
    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-dhc-access-network-identifier/13/},
    author =    {Shwetha Bhandari and Sri Gundavelli and Mark Grayson and Bernie Volz and Jouni Korhonen},
    title =     {{Access-Network-Identifier Option in DHCP}},
    pagetotal = 20,
    year =      2016,
    month =     feb,
    day =       1,
    abstract =  {This document specifies the format and mechanism that is to be used for encoding Access-Network Identifiers in DHCPv4 and DHCPv6 messages by defining new Access-Network-Identifier options and sub-options.},
}