- Author
- Proof Wiki Contributors
- Title
- Set Union Preserves Subsets — Proof Wiki
- Year
- 2024
- URL
- https://proofwiki.org/wiki/Set_Union_Preserves_Subsets

```
@misc{proof-wiki:set-union-preserves-subsets,
AUTHOR = "{Proof Wiki Contributors}",
TITLE = "Set Union Preserves Subsets --- {Proof Wiki}",
YEAR = "2024",
URL = "https://proofwiki.org/wiki/Set\_Union\_Preserves\_Subsets"
}
```