Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.
APA4ort.xyz Knowledge Graph. (2026). Category:Karl August von Hardenberg. Retrieved May 3, 2026, from https://4ort.xyz/entity/category-karl-august-von-hardenberg
MLA“Category:Karl August von Hardenberg.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/category-karl-august-von-hardenberg.
BibTeX@misc{4ortxyz_category-karl-august-von-hardenberg_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Category:Karl August von Hardenberg}}, year = {2026}, url = {https://4ort.xyz/entity/category-karl-august-von-hardenberg}, note = {Accessed: 2026-05-03}}
LLM promptAccording to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Category:Karl August von Hardenberg — https://4ort.xyz/entity/category-karl-august-von-hardenberg (retrieved 2026-05-03)