Citace podle APA

Helrich, K. E. (1990). Official methods of analysis of the Association of Official Analytical Chemists (15th ed.).

Styl Chicago

Helrich, Kenneth; Editor. Official Methods of Analysis of the Association of Official Analytical Chemists. 15th ed. Virginia, Association of Official Analytical Chemists, 1990.

Citace podle MLA

Helrich, Kenneth; Editor. Official Methods of Analysis of the Association of Official Analytical Chemists. 15th ed. 1990.

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