APA (7 वां संस्करण) प्रशस्ति पत्र

(2002). Keep fit for life: Meeting the nutritional needs of older persons. World Health Organization : Tufts University, School of Nutrition and Policy.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Keep Fit for Life: Meeting the Nutritional Needs of Older Persons. Geneva: World Health Organization : Tufts University, School of Nutrition and Policy, 2002.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Keep Fit for Life: Meeting the Nutritional Needs of Older Persons. World Health Organization : Tufts University, School of Nutrition and Policy, 2002.