1. Abrams, K. (2008). Forbearant and engaged tolerance: A comment on David Heyd. In M. S. Williams & J. Waldron (Eds.), Toleration and its limits: Nomos XLVIII (pp. 195–219). New York University Press.
2. Aristotle. (2004). Nicomachean ethics (C. Rowe & S. Broadie, Eds.). Oxford University Press.
3. Asad, T. (1990). Multiculturalism and British identity in the wake of the Rushdie affair. Politics and Society, 18(4), 455–480.
4. Asad, T. (2009). Free speech, blasphemy, and secular criticism. In T. Asad, W. Brown, J. Butler, & S. Mahmood (Eds.), Is critique secular? Blasphemy, injury, and free speech (pp. 20–63). Fordham University Press.
5. Ash, T. G. (2016). Free speech: Ten principles for a connected world. Atlantic Books.