杜博. (2010). 你该怎么办: Can I help you. 知识出版社.
Chicago Style aipamena杜博. 你该怎么办: Can I Help You. 知识出版社, 2010.
MLA aipamena杜博. 你该怎么办: Can I Help You. 知识出版社, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena