Fresenius, C. R. (1879). A system of instruction in quantitative chemical analysis: From the last English and German editions ([lst American ed.].). J. Wiley & Sons.
Chicago-referens (17:e uppl.)Fresenius, C. Remigius. A System of Instruction in Quantitative Chemical Analysis: From the Last English and German Editions. [lst American ed.]. N.Y.: J. Wiley & Sons, 1879.
MLA-referens (8:e uppl.)Fresenius, C. Remigius. A System of Instruction in Quantitative Chemical Analysis: From the Last English and German Editions. [lst American ed.]. J. Wiley & Sons, 1879.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.