Answer:
Tertiary source
Step-by-step explanation:
Wikipedia is an example of an encyclopedia that, in a virtual way, manages to expose articles that were built through the union of several primary and secondary research sources. When a document is built with this variety of sources, it means that it is a tertiary source.
In other words, a Wikipedia article on ancient Egypt, is constructed using a compilation of primary and secondary sources, and is therefore a tertiary source.