Library of Congress. Copyright Office. Reproduction of Copyrighted Works by Educators and Librarians.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLibrary of Congress. Copyright Office. Reproduction of Copyrighted Works by Educators and Librarians.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLibrary of Congress. Copyright Office. Reproduction of Copyrighted Works by Educators and Librarians.
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