In an annotated works cited, is it in alphabetical order by the author or first letter of the source?I did this wrong two time and my teacher is...

In an annotated works cited list, the order
that is correct to use is the first letter of the source in
creating your alphabetical order. The reason for this is that sometimes
there is not a single author for a work or an author at all. This can happen when the
information you cite comes from a company's literature which is a collective statement,
not necessarily something by one author. This occurs more and more with Web created
materials as well. Depending on your format, APA or MLA, your indent or justification
varies. Usually, the indent is a hanging indent which means the first line is all the
way left justified and everything after that is indented for each
entry.