Which document is considered a primary source that includes references to secondary sources?

The U.S. Declaration of Independence is regarded as a primary source because it is an original document that was created at a specific time in history, reflecting the thoughts and intentions of its authors, particularly in relation to the American colonies' desire for independence from British rule. It is a firsthand account of the founding principles and beliefs that guided the leaders during that period.

While primary sources are valuable for their direct connection to historical events, they can also reference secondary sources. In the case of the Declaration of Independence, it draws upon Enlightenment ideals and philosophies, which are often discussed in secondary texts. Therefore, the Declaration's content can include allusions to other thinkers and their contributions, making it a unique example of a primary source that invokes secondary influences.

The U.S. Constitution, The Federalist Papers, and The Bill of Rights, while also vital historical documents, do not serve as primary sources including explicit references to secondary sources in the same manner as the Declaration does. They focus more on laws, amendments, or discussions of political theory rather than directly invoking secondary materials within their texts.