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.
Lua i Stíl Chicago (17ú heag.)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.
Lua MLA (8ú heag.)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.
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