叶芝 & 罗池. (2018). 当你老了: When you are old. 江西人民出版社.
Chicago Style aipamena叶芝 and 罗池. 当你老了: When You Are Old. 江西人民出版社, 2018.
MLA aipamena叶芝 and 罗池. 当你老了: When You Are Old. 江西人民出版社, 2018.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena