Хемијска формула — разлика између измена

* {{Cite book |ref=harv|title= General Chemistry: Principles and Modern Applications |url=https://archive.org/details/generalchemistry00hill|edition= 8th |publisher= Prentice-Hall |year= 2002 |chapter= 3 |author= Ralph S. Petrucci |author2 = William S. Harwood |author3 = F. Geoffrey Herring |id={{ISBN|0-13-198825-5}} |oclc=46872308}}