THORPE, E. (2010). GENERAL STUDIES MANUAL 2010: FOR THE UPSC CIVIL SERVICES PRELIMINARY EXAMINATION. PEARSON EDUCATION.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTHORPE, E. GENERAL STUDIES MANUAL 2010: FOR THE UPSC CIVIL SERVICES PRELIMINARY EXAMINATION. NEW DELHI: PEARSON EDUCATION, 2010.
एमएलए (9वां संस्करण) प्रशस्ति पत्रTHORPE, E. GENERAL STUDIES MANUAL 2010: FOR THE UPSC CIVIL SERVICES PRELIMINARY EXAMINATION. PEARSON EDUCATION, 2010.
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