俞瑶著. (2017). 爱在欧洲旅行时 A long journey in Europe：．，. 北岳文艺出版社.
Chicago Style (17th ed.) Citation俞瑶著. 爱在欧洲旅行时 A Long Journey in Europe：．，. 北岳文艺出版社, 2017.
MLA (8th ed.) Citation俞瑶著. 爱在欧洲旅行时 A Long Journey in Europe：．，. 北岳文艺出版社, 2017.
Warning: These citations may not always be 100% accurate.