(The following bullet points are from the NHD Rulebook)
List only those sources that contributed to the development of your entry, i.e., sources that provided usable information or new perspectives in preparing your entry
Bundle photos or other materials from the same collection in a single citation.
The annotations for each source must explain how you used the source and how it helped you understand your topic.
Your annotated bibliography is not included in the word count.
You are required to separate your bibliography into two sections: one for primary sources and one for secondary sources.
You must use Chicago/Turabian or MLA Style formatting (I recommend MLA)
The Annotated Bibliography Formatting
Your list should be titled “Annotated Bibliography.”
Divide your Annotated Bibliography into two sections, labeled "Primary Sources" and "Secondary Sources."
Single-space each entry and skip one line between entries.
All source citations are tabbed 1/2 inch (one tab) after the first line.