雷·古森, 雷. (2011). 胆小的鸭子.
Chicago Style (17th ed.) Citation雷·古森, 雷欧·科文著. 胆小的鸭子. 湖北美术出版社, 2011.
MLA (8th ed.) Citation雷·古森, 雷欧·科文著. 胆小的鸭子. 2011.
Warning: These citations may not always be 100% accurate.
APA (7th ed.) Citation