(2009). Code of conduct for whale watching. U.P. News.
芝加哥风格引文"Code of Conduct for Whale Watching." U.P. News 2009.
MLA引文"Code of Conduct for Whale Watching." U.P. News, 2009.
警告：这些引文格式不一定是100％准确.
APA引文
(2009). Code of conduct for whale watching. U.P. News.
芝加哥风格引文"Code of Conduct for Whale Watching." U.P. News 2009.
MLA引文"Code of Conduct for Whale Watching." U.P. News, 2009.