Referensi :

http://www.cisco.com/en/US/tech/tk713/tk507/technologies_tech_note09186a0080093c6f.shtml [12 Februari 2011]

Simpson, William Allen, Brian Lloyd. 1992. PPP Authentication Protocols. [online] tersedia: http://tools.ietf.org/html/rfc1334 [12 Februari 2011]

http://www.javvin.com/protocolPAP.html [12 Februari 2011]