于阳. (2008). 给幸福留一扇门: Leave a door open for happiness. 陕西师范大学出版社.
Chicago Style (17th ed.) Citation于阳. 给幸福留一扇门: Leave a Door Open for Happiness. 陕西师范大学出版社, 2008.
Cita MLA于阳. 给幸福留一扇门: Leave a Door Open for Happiness. 陕西师范大学出版社, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.