Kollak, I. (2013). Yoga XXL: A journey to health for bigger people. Demos Health.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKollak, Ingrid. Yoga XXL: A Journey to Health for Bigger People. New York: Demos Health, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKollak, Ingrid. Yoga XXL: A Journey to Health for Bigger People. Demos Health, 2013.
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