APA (7 वां संस्करण) प्रशस्ति पत्र
ebrary, Inc, Astor, R., & Jeffereys, K. (2000). Positive initiatives for people with learning difficulties: Promoting healthy lifestyles. Macmillan.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
ebrary, Inc, Roberta Astor, और Karen Jeffereys. Positive Initiatives for People with Learning Difficulties: Promoting Healthy Lifestyles. Basingstoke: Macmillan, 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
ebrary, Inc, et al. Positive Initiatives for People with Learning Difficulties: Promoting Healthy Lifestyles. Macmillan, 2000.
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