Sumber dari:
http://www.cochlear.com/wps/wcm/connect/3916e293-476b-488e-b45b-5e4e82b3d351/product_cochlearimplant_rehabilitationresources_earlyintervention_soundfoundationforbabies_weeklyhomelessons_auditionweek10_en_922kb.pdf?MOD=AJPERES&CONVERT_TO=url&CACHEID=3916e293-476b-488e-b45b-5e4e82b3d351
http://www.cochlear.com/wps/wcm/connect/3916e293-476b-488e-b45b-5e4e82b3d351/product_cochlearimplant_rehabilitationresources_earlyintervention_soundfoundationforbabies_weeklyhomelessons_auditionweek10_en_922kb.pdf?MOD=AJPERES&CONVERT_TO=url&CACHEID=3916e293-476b-488e-b45b-5e4e82b3d351
