Tools: computer, Zotero software.

1. Import document: import the document into Zotero software. You can manually enter the data into Zotero, or use the search tool to directly search related literature.

2. Format setting: In Zotero, you can customize the format setting. You can adjust the format according to your needs, including font, font size, line spacing, alignment, etc.

3. Output literature citation: Finally, literature citation can be output in Harvard paper format. In Zotero, you can choose Harvard as the output format, and then copy the generated references into the paper.