APA (7 वां संस्करण) प्रशस्ति पत्र
Koepke, D., & Fahey, C. (2016). The essential spirit: Providing wholistic services to and with older adults. Pickwick Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Koepke, Donald, और Charles Fahey. The Essential Spirit: Providing Wholistic Services to and with Older Adults. Eugene, Oregon: Pickwick Publications, 2016.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Koepke, Donald, और Charles Fahey. The Essential Spirit: Providing Wholistic Services to and with Older Adults. Pickwick Publications, 2016.
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