BBC Worldwide Ltd, Maxwell, J., West, N., & Laurenson, J. (2010). The shadow of the tower. BBC Worldwide ; Distributed by Warner Home Video.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBBC Worldwide Ltd, James Maxwell, Norma West, और James Laurenson. The Shadow of the Tower. [London] : Burbank, CA: BBC Worldwide ; Distributed by Warner Home Video, 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBBC Worldwide Ltd, et al. The Shadow of the Tower. BBC Worldwide ; Distributed by Warner Home Video, 2010.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.