Παραπομπή σε μορφή APA (7η εκδ.)

Nielsen, K., Rondel, D., & Sager, A. E. (2012). Pessimism of the intellect, optimism of the will: The political philosophy of Kai Nielsen. University of Calgary Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Nielsen, Kai, David Rondel, και Alexander E. Sager. Pessimism of the Intellect, Optimism of the Will: The Political Philosophy of Kai Nielsen. Calgary, Alberta: University of Calgary Press, 2012.

Παραπομπή σε μορφή MLA (8th εκδ.)

Nielsen, Kai, et al. Pessimism of the Intellect, Optimism of the Will: The Political Philosophy of Kai Nielsen. University of Calgary Press, 2012.