Association of Official Agricultural. (1975). Official methods of analysis of the Association of Official Agricultural Chemists (Twelfth Edition.). Association of Official Agricultural Chemists.
Chicago-referens (17:e uppl.)Association of Official Agricultural. Official Methods of Analysis of the Association of Official Agricultural Chemists. Twelfth Edition. Washington, D. C: Association of Official Agricultural Chemists, 1975.
MLA-referens (9:e uppl.)Association of Official Agricultural. Official Methods of Analysis of the Association of Official Agricultural Chemists. Twelfth Edition. Association of Official Agricultural Chemists, 1975.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.