(1996). International standard ISO 717 (1996-12-15). Acoustics-rating of s ound insulation in buildings and of building elements =: Acoustique-evaluation de l' isolement acoustique des immeubles et des elements de construction (2nd ed.). Geneve: International Organization for Standardization.
Παραπομπή Chicago StyleInternational Standard ISO 717 (1996-12-15). Acoustics-rating of S Ound Insulation in Buildings and of Building Elements =: Acoustique-evaluation De L' Isolement Acoustique Des Immeubles Et Des Elements De Construction. 2nd ed. Geneve: International Organization for Standardization, 1996.
Παραπομπή MLAInternational Standard ISO 717 (1996-12-15). Acoustics-rating of S Ound Insulation in Buildings and of Building Elements =: Acoustique-evaluation De L' Isolement Acoustique Des Immeubles Et Des Elements De Construction. 2nd ed. Geneve: International Organization for Standardization, 1996.