(英)朱莉·贝利著. (2017). A very busy day. 长江少年儿童出版社.
Chicago Style aipamena(英)朱莉·贝利著. A Very Busy Day. 长江少年儿童出版社, 2017.
MLA aipamena(英)朱莉·贝利著. A Very Busy Day. 长江少年儿童出版社, 2017.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena