执云 & 魏茂峰. (2009). 找出一万个理由微笑: One million reason to smile. 光明日报出版社.
Chicago Style (17th ed.) Citation执云 and 魏茂峰. 找出一万个理由微笑: One Million Reason to Smile. 光明日报出版社, 2009.
MLA citiranje执云 and 魏茂峰. 找出一万个理由微笑: One Million Reason to Smile. 光明日报出版社, 2009.
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