RFC 1034, Domain Names — Concepts and Facilities, P. Mockapetris, The Internet Society (November 1987)
RFC 1035, Domain Names — Implementation and Specification, P. Mockapetris, The Internet Society (November 1987)
wikipedia.org
en.wikipedia.org
"Composite Application Manager for Internet Service Monitoring, Reference Guide". IBM. Missing or empty |url= (bantuan); |access-date= requires |url= (bantuan)
