Also, gave a few ideas about both pros and cons of rights
Regan, Tom. The Case for Animal Rights. University of California Press. Berkeley, Los Angeles. 1983. -Since Regan is very pro-rights, his book helped with that part of the paper.
Rodd, Rosemary. Biology, Ethics, and Animals. Oxford University Press. New York, New York. 1990.
-Helped with the ethical aspect of the paper (part b). Also contains values of animals and humans.
Rollin, Bernard E. Animal Rights and Human Morality. Prometheus Books. Buffalo, New York. 1981. -Contained aspect of the soul and relates theories of Kant (very helpful!)
Smart, J.J.C.; Williams, Bernard. Utilitarianism: for and against. Cambridge University Press. Cambridge. 1973. -Used to develop strength and weaknesses of mill's ideas
Smith, Norman K. Immanuel Kant's Critique of Pure Reason. The Humanities Press. New York, New York. 1933. -This text was used sparingly to develop Kant's understanding of reason.
Sorabji, Richard. Animal Minds and Human Morals: The Origins of the Western Debate. Cornell University Press. Ithaca, New York. 1993. -Goes through and evaluates aspects of humans and compares them to