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-viite (17. p.)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-viite (8. p.)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.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.