Supported by the following organizations
This is to certify that Piotr Kostrzewa successfully completed and received a passing grade in AESTHINT15: Rhetoric: The Art of Persuasive Writing and Public Speaking a course of study offered by HarvardX, an online learning initiative of Harvard University.
Noted by
James Engell
Gurney Professor of English and Professor of Comparative Literature Harvard University
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- Verified Certificate Issued July 24, 2024
- Valid Certificate ID 95027280165f419aa2383a6e3ad16922