Dickens, C. (2001). Pictures from Italy. Project Gutenberg.
芝加哥风格引文Dickens, Charles. Pictures from Italy. Champaign, IL: Project Gutenberg, 2001.
MLA引文Dickens, Charles. Pictures from Italy. Project Gutenberg, 2001.
警告：这些引文格式不一定是100％准确.
APA引文