If some symbols in the annotated bibliography do not show up properly on your screen, then probably some unconventional fonts used in the annotated bibliography have not been installed on your computer. The pdf file will not have this problem and will display the symbols properly. If you want to get the symbols right in the Word file, you can go to the link below and in Section 1 there click on the link for downloading fonts. Installing many fonts on your computer brings several advantages. I cannot think of any disadvantage.
Getting fonts for mathematical symbols.