Question: Footnotes and Direct References

F.A.Q. #20

If, in the narrative of your works, you make a direct reference to your source such as "In his book Jefferson the President, author Dumas Malone asserts that Thomas Jefferson was blah, blah, blah, etc.", would I still need a footnote? I am thinking probably so to document publisher, page number, etc.

Thank you so much for your time and I appreciate your very detailed answer.