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 i 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.
Cita MLA执云 i 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.
Atenció: Aquestes cites poden no estar 100% correctes.