O'Connor, J., & Hammond, T. (2016). What were the Twin Towers? Grosset & Dunlap.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रO'Connor, Jim, और Ted Hammond. What Were the Twin Towers? New York: Grosset & Dunlap, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रO'Connor, Jim, और Ted Hammond. What Were the Twin Towers? Grosset & Dunlap, 2016.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.