APA引文

(2013). 'When a great tree falls...'. U.P. News.

芝加哥风格引文

"'When a Great Tree Falls...'." U.P. News 2013.

MLA引文

"'When a Great Tree Falls...'." U.P. News, 2013.

警告：这些引文格式不一定是100％准确.