APA (7 ম সংস্করণ) উদ্ধৃতি

Penrose, R. (1994). Shadows of the mind: A search for the missing science of consciousness. Oxford University Press.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Penrose, Roger. Shadows of the Mind: A Search for the Missing Science of Consciousness. Oxford: Oxford University Press, 1994.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Penrose, Roger. Shadows of the Mind: A Search for the Missing Science of Consciousness. Oxford University Press, 1994.