Are books being cited in papers anymore?

During my trip to Chicago, I went to a  networking event. At the event, I met an adjunct professor who teaches digital media. We discuss that even in this day and age of Wikipedia and search, that its important that students use and understand the fundamentals of actually using and citing books for research.

Back when I taught, I specifically indicated that I wanted at least 10 sources to be from books. It would be interesting to know if professors are still requiring some if not all of sources cited in student papers to be books.

Its important for students to know the fundamentals of research. After all, we didn’t always have computers and internet connections.