Hanging Indent: Be sure each citation has the first line aligned left, and every subsequent line indented. You do this in Google Docs by doing the following:
Highlight the lines you need to have a hanging indent > Format > Align & Indent > Indentation Options > Special Indent > Hanging > Apply
Alphabetize: Be sure that your citations are in alphabetical order based on the first word in each citation.
Annotation Indentation: The annotation should be indented even further than the hanging indent. You do this in Google Docs by doing the following:
Highlight your annotation > Format > Align & Indent > Increase Indent
What to Include in Your Annotation
Write a short paragraph giving an overview or summary of the source and how it helped in your research.