Association of Official Agricultural Chemists. (1919). Official methods of analysis (13th ed.). [s.n.].
芝加哥风格引文Association of Official Agricultural Chemists. Official Methods of Analysis. 13th ed. Washington: [s.n.], 1919.
MLA引文Association of Official Agricultural Chemists. Official Methods of Analysis. 13th ed. [s.n.], 1919.
警告：这些引文格式不一定是100％准确.