How to properly group and attribute quotes?

I have this list of 206 quotes from all sorts of sources (speeches, books, movies, tv shows, etc.), and I am trying to attribute them in a way that best lends itself to alphabetizing by source. But I’m not sure if it should be grouped by the actor (should all John Waybe quotes go together) or by show (should all quotes from I Love Lucy be grouped) or what.

Should movie quotes be listed as Actor, Movie, or as Character, Movie? What about quotes from TV shows and books?

Is there an accepted way to do this?

BTW, here is the file that I am working with, if that helps.

Your quote:

should read: