Citeer als: (12 januari 2021) IFRA Standards Library. Geert De Vuyst. https://geertdevuyst.be/publicatie/2020-ifra-standards-library-49th-amendment/
TitelIFRA Standards LibraryAuteur(s)The International Fragrance AssociationVersie49th AmendmentPublicatiejaar2020UitgeverThe International Fragrance AssociationURLhttps://ifrafragrance.org/ Citeer alsThe International Fragrance Association (2020). IFRA Standards Library. 49th Amendment. https://ifrafragrance.org/