Ball. Working in the Killing Fields. University of Nebraska Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBall. Working in the Killing Fields. University of Nebraska Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBall. Working in the Killing Fields. University of Nebraska Press.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.