APA
Association of Official Analytical Chemists, . (1990). Official Methods of Analysis of the Association of Official Analytical Chemists. Washinton. S.E: .
Chicago
Association of Official Analytical Chemists, . 1990. Official Methods of Analysis of the Association of Official Analytical Chemists. Washinton. S.E: .
Harvard
Association of Official Analytical Chemists, . (1990). Official Methods of Analysis of the Association of Official Analytical Chemists. Washinton. S.E: .
MLA
Association of Official Analytical Chemists, . Official Methods of Analysis of the Association of Official Analytical Chemists. Washinton. S.E: . 1990.
