1. Aquinas, T. (1920). Summa Theologiae. (Fathers of the Dominican Province, Trans.) (2nd, Revised Ed.). Retrieved from http://www.newadvent.org/summa/index.html .
2. Benjamin, M. (1990). Splitting the difference: Compromise and integrity in ethics and politics. Lawrence, KS: University of Kansas Press.
3. Berlin, I. (1950). Political ideas in the twentieth century. Foreign Affairs, 28(3), 351–385. doi: 10.2307/20030256 .
4. Berlin, I. (1969). Two concepts of liberty. In Four essays on liberty (pp. 118–172). New York: Oxford University Press.
5. Brenkert, G. (2009). Google, human rights, and moral compromise. Journal of Business Ethics, 85(4), 453–478.