APA (7 वां संस्करण) प्रशस्ति पत्र
Walker, R. (2005). Social security and welfare: Concepts and comparisons. Open University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Walker, Robert. Social Security and Welfare: Concepts and Comparisons. Maidenhead: Open University Press, 2005.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Walker, Robert. Social Security and Welfare: Concepts and Comparisons. Open University Press, 2005.
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