Association of Official Agricultural. (1975). Official methods of analysis of the Association of Official Agricultural Chemists (Twelfth Edition.). Association of Official Agricultural Chemists.
Cita Chicago Style (17a ed.)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.
Cita MLA (9a ed.)Association of Official Agricultural. Official Methods of Analysis of the Association of Official Agricultural Chemists. Twelfth Edition. Association of Official Agricultural Chemists, 1975.
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