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.
Cita Chicago Style (17a ed.)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 (8a ed.)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.
Precaución: Estas citas no son 100% exactas.