Das, G. (2012). The Difficulty of being good. Penguin Books.
Chicago Style aipamenaDas, Gurcharan. The Difficulty of Being Good. New Delhi: Penguin Books, 2012.
MLA aipamenaDas, Gurcharan. The Difficulty of Being Good. Penguin Books, 2012.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.