Retrieved March 16, 2018. > "RFC 4271 - A Border Gateway Protocol 4 (BGP-4)". ietf.org. > "The History of Border Gateway Protocol". blog.datapath.io.
2013년 10월 8일에 확인함. > > “RFC 4271 - A Border Gateway Protocol 4 (BGP-4)”. 《ietf.org》.  > “The History of Border Gateway Protocol”. 《blog.datapath.io》.