Helrich, K. (1984). Official methods of analysis of the Association of Official Analytical Chemists (14a. ed.). Association of Official Analytical Chemists.
Chicago-Zitierstil (17. Ausg.)Helrich, Kenneth. Official Methods of Analysis of the Association of Official Analytical Chemists. 14a. ed. Arlington: Association of Official Analytical Chemists, 1984.
MLA-Zitierstil (9. Ausg.)Helrich, Kenneth. Official Methods of Analysis of the Association of Official Analytical Chemists. 14a. ed. Association of Official Analytical Chemists, 1984.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.