Zappia. Traders and Raiders. The University of North Carolina Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रZappia. Traders and Raiders. The University of North Carolina Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रZappia. Traders and Raiders. The University of North Carolina Press.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.