Opp, A. (2008). How the East Was Won. Eigenverlag des Verfassers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOpp, Alfred. How the East Was Won. Richmond, British Columbia, Canada: Eigenverlag des Verfassers, 2008.
एमएलए (8वां संस्करण) प्रशस्ति पत्रOpp, Alfred. How the East Was Won. Eigenverlag des Verfassers, 2008.
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