Helrich, K. (1990). Official methods of analysis of the Association of Official Analytical Chemists (15a. ed.). Association of Official Analytical Chemists.
Chicagoスタイル(17版)引用形式Helrich, Kenneth. Official Methods of Analysis of the Association of Official Analytical Chemists. 15a. ed. Arlington: Association of Official Analytical Chemists, 1990.
MLA(9版)引用形式Helrich, Kenneth. Official Methods of Analysis of the Association of Official Analytical Chemists. 15a. ed. Association of Official Analytical Chemists, 1990.
警告: この引用は必ずしも正確ではありません.