Schlegel, S. A. (2007). Science, spirits and common sense: Thee Espiritistas of Upi. Tambara.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSchlegel, Stuart A. "Science, Spirits and Common Sense: Thee Espiritistas of Upi." Tambara 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSchlegel, Stuart A. "Science, Spirits and Common Sense: Thee Espiritistas of Upi." Tambara, 2007.
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