APA (7 वां संस्करण) प्रशस्ति पत्र
Smullyan, R. M. (2003). Who knows?: A study of religious consciousness. Indiana University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Smullyan, Raymond M. Who Knows?: A Study of Religious Consciousness. Bloomington: Indiana University Press, 2003.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Smullyan, Raymond M. Who Knows?: A Study of Religious Consciousness. Indiana University Press, 2003.
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