than is the conjunction. in order for it to be coordinating, it must join two independent clauses, which it doesn't. correlative conjunctions are a pair of words, and than is just one word. subordinating conjunctions join an independent clause to a dependent one, so that is the answer.
<span>When assembling a final bibliography, list your sources in alphabetical order by authors' last names. Sources that don't have authors should be alphabetized by title.</span>
