余长保. (2010). 三句话打动他人心: Three sentences touched people's hearts. 北京理工大学出版社.
Chicago Style (17th ed.) Citation余长保. 三句话打动他人心: Three Sentences Touched People's Hearts. 北京理工大学出版社, 2010.
Cita MLA余长保. 三句话打动他人心: Three Sentences Touched People's Hearts. 北京理工大学出版社, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.