Helgren. American Girls and Global Responsibility. Rutgers University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHelgren. American Girls and Global Responsibility. Rutgers University Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHelgren. American Girls and Global Responsibility. Rutgers University Press.
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