Warwick, S. (2012). Upstairs & downstairs: The illustrated guide to the real world of Downton Abbey. Carlton Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWarwick, Sarah. Upstairs & Downstairs: The Illustrated Guide to the Real World of Downton Abbey. London: Carlton Books, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWarwick, Sarah. Upstairs & Downstairs: The Illustrated Guide to the Real World of Downton Abbey. Carlton Books, 2012.
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