张丹丹. (2010). 赢在乐观: Win in the optimistic. 中国商业出版社.
Chicago Style aipamena张丹丹. 赢在乐观: Win in the Optimistic. 中国商业出版社, 2010.
MLA aipamena张丹丹. 赢在乐观: Win in the Optimistic. 中国商业出版社, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena