National Council for the Social Studies. Social education. Naitonal Council for the Social Studies.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Council for the Social Studies. Social Education. Washington: Naitonal Council for the Social Studies.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNational Council for the Social Studies. Social Education. Naitonal Council for the Social Studies.
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