Complex sentence: Gutmann, Amy and Dennis Thompson, "Democracy and Disagreement" (Princeton University Press, 1996), and Amy Gutmann and Dennis Thompson, "Why Deliberative Democracy?" (Princeton University Press, 2002).
Split into simpler sentences: Gutmann, Amy, and Dennis Thompson, "Democracy and Disagreement" (Princeton University Press, 1996). Also see Gutmann and Thompson, "Why Deliberative Democracy?" (Princeton University Press, 2002).