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.
Stile di citazione Chicago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.
Citazione 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.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.