(1995). International standard ISO 140. Acoustics - measurement of sound insulation in buildings and of building elements =: Acoustique- mesurage de l'isolation acoustique des immeubles et des elements de construction (2nd ed.). Geneve: International Organization for Standardization.
Παραπομπή Chicago StyleInternational Standard ISO 140. Acoustics - Measurement of Sound Insulation in Buildings and of Building Elements =: Acoustique- Mesurage De L'isolation Acoustique Des Immeubles Et Des Elements De Construction. 2nd ed. Geneve: International Organization for Standardization, 1995.
Παραπομπή MLAInternational Standard ISO 140. Acoustics - Measurement of Sound Insulation in Buildings and of Building Elements =: Acoustique- Mesurage De L'isolation Acoustique Des Immeubles Et Des Elements De Construction. 2nd ed. Geneve: International Organization for Standardization, 1995.