6 How Do I Know The Source Is A Reference Book?
To learn about the clues that help to identify an entry in a reference book, click on the information symbols: 
Bibliography entry:
French, David. “Passchendale, Battle of, 1917.” In The Oxford Companion to British History, edited by John Cannon and Robert Crowcroft. 2nd ed. Oxford University Press, 2015. Credo Reference.
