裴春艳. (2011). 气球回来了: Balloons are back. 天津教育出版社.
Chicago Style aipamena裴春艳. 气球回来了: Balloons Are Back. 天津教育出版社, 2011.
MLA aipamena裴春艳. 气球回来了: Balloons Are Back. 天津教育出版社, 2011.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena