Preston, E. B. (1895). California gold mill practices. A.J. Johnston, superintendent state printing.
芝加哥风格引文Preston, Edmund B. California Gold Mill Practices. Sacramento,: A.J. Johnston, superintendent state printing, 1895.
MLA引文Preston, Edmund B. California Gold Mill Practices. A.J. Johnston, superintendent state printing, 1895.
警告：这些引文格式不一定是100％准确.