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 (17e ed.) Bronvermelding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.
MLA (8e ed.) Bronvermelding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.
Let op: Deze citaties zijn niet altijd 100% accuraat.