Question : How has gender representation changed over the years in Disney films?
Focusing on Sleeping Beauty vs Mulan
So I would include external factors at the time of creation e.g. sexism work environment and feminist milestones that occurred etc, also mention the original sources of the stories, and any relevant gender theories.
Some sources already.
Butler, L. (2014). How Sleeping Beauty is Accidentally the Most Feminist Animated Movie Disney Ever Made. Available: http://www.tor.com/blogs/2014/11/how-sleeping-beauty-is-accidentally-the-most-feminist-animated-movie-disney-ever-made-and-how-maleficent-proves-it. Last accessed 2 Dec 2014.
Saraiya. (2012). Ranked: Disney Princesses From Least To Most Feminist. Available: http://www.nerve.com/entertainment/ranked/ranked-disney-princesses-from-least-to-most-feminist. Last accessed 2 Dec 2014.