魏棻卿. (2018). 心怀正向的信念: Have positive beliefs. 青岛出版社.
Chicago Style aipamena魏棻卿. 心怀正向的信念: Have Positive Beliefs. 青岛出版社, 2018.
MLA aipamena魏棻卿. 心怀正向的信念: Have Positive Beliefs. 青岛出版社, 2018.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena