Pirntke, U., & Ahrens, A. (1999). Guidance manual formulators and other professional users of chemicals: Requirements with regard to the release of chemical substances into water ecosystems - information for the users of chemicals. Umweltbundesamt.
Chicago-Zitierstil (17. Ausg.)Pirntke, Ulrike, und Andreas Ahrens. Guidance Manual Formulators and Other Professional Users of Chemicals: Requirements with Regard to the Release of Chemical Substances into Water Ecosystems - Information for the Users of Chemicals. Berlin: Umweltbundesamt, 1999.
MLA-Zitierstil (9. Ausg.)Pirntke, Ulrike, und Andreas Ahrens. Guidance Manual Formulators and Other Professional Users of Chemicals: Requirements with Regard to the Release of Chemical Substances into Water Ecosystems - Information for the Users of Chemicals. Umweltbundesamt, 1999.