李永新. (2021). 笔杆子是怎样炼成的: Practice of official document writing. 清华大学出版社.
Dyfyniad Arddull Chicago李永新. 笔杆子是怎样炼成的: Practice of Official Document Writing. 清华大学出版社, 2021.
Dyfyniad MLA李永新. 笔杆子是怎样炼成的: Practice of Official Document Writing. 清华大学出版社, 2021.
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