俞敏洪 & 王强. (2007). 希望长着翅膀: Hope is the thing with feathers. 群言出版社.
Chicago Style (17th ed.) Citation俞敏洪 and 王强. 希望长着翅膀: Hope Is the Thing with Feathers. 群言出版社, 2007.
MLA (8th ed.) Citation俞敏洪 and 王强. 希望长着翅膀: Hope Is the Thing with Feathers. 群言出版社, 2007.
Warning: These citations may not always be 100% accurate.