Jacobsen, A. (2014). Operation paperclip: The secret intelligence program that brought nazi scientists to america (Unabridged.).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJacobsen, Annie. Operation Paperclip: The Secret Intelligence Program That Brought Nazi Scientists to America. Unabridged. 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रJacobsen, Annie. Operation Paperclip: The Secret Intelligence Program That Brought Nazi Scientists to America. Unabridged. 2014.
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