The article in the Telegraph used a variety of sources when talking about the potential republishing of Adolf Hitler's "Mein Kampf".
The article used many sources, including historical organization, government organizations, cultural groups, and specific people. These include names such as the Institute of Contemporary History, Bavaria's finance ministry, and Jewish group leaders.
While many organizations were named, there were very few names of specific people in the article except for the Adolf Hitler.
Attribution is used throughout the article, stating who said the facts or opinions that are being reported and overall, the story seems to take advantage of sources very well.