俞敏洪 & 王强. (2007). 希望长着翅膀: Hope is the thing with feathers. 群言出版社.
Citación estilo Chicago俞敏洪 and 王强. 希望长着翅膀: Hope Is the Thing with Feathers. 群言出版社, 2007.
Cita MLA俞敏洪 and 王强. 希望长着翅膀: Hope Is the Thing with Feathers. 群言出版社, 2007.
警告：这些引文格式不一定是100％准确.